py: Allow to override port config file and thus have >1 configs per port.
py: Allow to override port config file and thus have >1 configs per port.

Use it like:

make CFLAGS_EXTRA='-DMP_CONFIGFILE="<mpconfigport_my.h>"'

chrisdearman/micropython,tobbad/micropython,kerneltask/micropython,PappaPeppar/micropython,neilh10/micropython,paul-xxx/micropython,jlillest/micropython,tdautc19841202/micropython,emfcamp/micropython,slzatz/micropython,MrSurly/micropython,EcmaXp/micropython,puuu/micropython,kerneltask/micropython,dinau/micropython,dhylands/micropython,ahotam/micropython,toolmacher/micropython,noahchense/micropython,orionrobots/micropython,cnoviello/micropython,vriera/micropython,Peetz0r/micropython-esp32,slzatz/micropython,torwag/micropython,dhylands/micropython,dmazzella/micropython,misterdanb/micropython,tuc-osg/micropython,noahwilliamsson/micropython,drrk/micropython,henriknelson/micropython,tdautc19841202/micropython,hosaka/micropython,redbear/micropython,feilongfl/micropython,tralamazza/micropython,suda/micropython,dxxb/micropython,jmarcelino/pycom-micropython,puuu/micropython,xuxiaoxin/micropython,adafruit/circuitpython,heisewangluo/micropython,PappaPeppar/micropython,misterdanb/micropython,mianos/micropython,AriZuu/micropython,xuxiaoxin/micropython,SHA2017-badge/micropython-esp32,tralamazza/micropython,cwyark/micropython,MrSurly/micropython,rubencabrera/micropython,bvernoux/micropython,turbinenreiter/micropython,TDAbboud/micropython,puuu/micropython,hosaka/micropython,henriknelson/micropython,selste/micropython,xyb/micropython,orionrobots/micropython,lbattraw/micropython,aethaniel/micropython,cwyark/micropython,jmarcelino/pycom-micropython,AriZuu/micropython,redbear/micropython,xyb/micropython,xuxiaoxin/micropython,heisewangluo/micropython,TDAbboud/micropython,drrk/micropython,KISSMonX/micropython,adafruit/micropython,TDAbboud/micropython,mhoffma/micropython,mgyenik/micropython,warner83/micropython,toolmacher/micropython,mgyenik/micropython,cloudformdesign/micropython,blazewicz/micropython,jmarcelino/pycom-micropython,Vogtinator/micropython,hiway/micropython,SHA2017-badge/micropython-esp32,jimkmc/micropython,utopiaprince/micropython,aethaniel/micropython,puuu/micropython,alex-march/micropython,MrSurly/micropython,torwag/micropython,TDAbboud/micropython,ruffy91/micropython,selste/micropython,SHA2017-badge/micropython-esp32,tdautc19841202/micropython,SungEun-Steve-Kim/test-mp,kostyll/micropython,ruffy91/micropython,pramasoul/micropython,orionrobots/micropython,kerneltask/micropython,toolmacher/micropython,neilh10/micropython,cwyark/micropython,pfalcon/micropython,ChuckM/micropython,ahotam/micropython,heisewangluo/micropython,xuxiaoxin/micropython,cnoviello/micropython,mpalomer/micropython,henriknelson/micropython,misterdanb/micropython,KISSMonX/micropython,jmarcelino/pycom-micropython,omtinez/micropython,lowRISC/micropython,TDAbboud/micropython,galenhz/micropython,orionrobots/micropython,chrisdearman/micropython,ryannathans/micropython,lowRISC/micropython,jmarcelino/pycom-micropython,ceramos/micropython,neilh10/micropython,HenrikSolver/micropython,ganshun666/micropython,noahchense/micropython,trezor/micropython,stonegithubs/micropython,SungEun-Steve-Kim/test-mp,bvernoux/micropython,utopiaprince/micropython,matthewelse/micropython,Peetz0r/micropython-esp32,lowRISC/micropython,trezor/micropython,xhat/micropython,mhoffma/micropython,tuc-osg/micropython,cwyark/micropython,infinnovation/micropython,deshipu/micropython,stonegithubs/micropython,tralamazza/micropython,ericsnowcurrently/micropython,pramasoul/micropython,lbattraw/micropython,redbear/micropython,bvernoux/micropython,dxxb/micropython,utopiaprince/micropython,jlillest/micropython,micropython/micropython-esp32,vriera/micropython,infinnovation/micropython,mianos/micropython,supergis/micropython,skybird6672/micropython,trezor/micropython,galenhz/micropython,mianos/micropython,mhoffma/micropython,emfcamp/micropython,adafruit/micropython,pfalcon/micropython,adafruit/micropython,torwag/micropython,redbear/micropython,ganshun666/micropython,omtinez/micropython,jimkmc/micropython,galenhz/micropython,KISSMonX/micropython,martinribelotta/micropython,omtinez/micropython,alex-march/micropython,feilongfl/micropython,swegener/micropython,swegener/micropython,ericsnowcurrently/micropython,deshipu/micropython,kerneltask/micropython,praemdonck/micropython,matthewelse/micropython,swegener/micropython,MrSurly/micropython-esp32,stonegithubs/micropython,danicampora/micropython,alex-march/micropython,hosaka/micropython,xuxiaoxin/micropython,blmorris/micropython,suda/micropython,slzatz/micropython,tdautc19841202/micropython,MrSurly/micropython-esp32,adamkh/micropython,dinau/micropython,matthewelse/micropython,heisewangluo/micropython,danicampora/micropython,EcmaXp/micropython,danicampora/micropython,tobbad/micropython,tobbad/micropython,stonegithubs/micropython,henriknelson/micropython,blmorris/micropython,ChuckM/micropython,ChuckM/micropython,AriZuu/micropython,oopy/micropython,MrSurly/micropython,galenhz/micropython,ruffy91/micropython,kerneltask/micropython,tralamazza/micropython,paul-xxx/micropython,SungEun-Steve-Kim/test-mp,pozetroninc/micropython,vriera/micropython,ganshun666/micropython,jlillest/micropython,Peetz0r/micropython-esp32,selste/micropython,Timmenem/micropython,feilongfl/micropython,alex-robbins/micropython,mpalomer/micropython,ernesto-g/micropython,vriera/micropython,drrk/micropython,toolmacher/micropython,turbinenreiter/micropython,infinnovation/micropython,adafruit/micropython,Peetz0r/micropython-esp32,warner83/micropython,kostyll/micropython,blazewicz/micropython,xhat/micropython,noahchense/micropython,AriZuu/micropython,cnoviello/micropython,hosaka/micropython,neilh10/micropython,jimkmc/micropython,supergis/micropython,tdautc19841202/micropython,ahotam/micropython,ryannathans/micropython,deshipu/micropython,HenrikSolver/micropython,skybird6672/micropython,mianos/micropython,praemdonck/micropython,swegener/micropython,danicampora/micropython,mpalomer/micropython,slzatz/micropython,ericsnowcurrently/micropython,chrisdearman/micropython,kostyll/micropython,hosaka/micropython,dhylands/micropython,adamkh/micropython,noahchense/micropython,Vogtinator/micropython,rubencabrera/micropython,ryannathans/micropython,SungEun-Steve-Kim/test-mp,mhoffma/micropython,Vogtinator/micropython,HenrikSolver/micropython,tobbad/micropython,ChuckM/micropython,ericsnowcurrently/micropython,toolmacher/micropython,ruffy91/micropython,paul-xxx/micropython,lbattraw/micropython,alex-robbins/micropython,torwag/micropython,ernesto-g/micropython,drrk/micropython,redbear/micropython,galenhz/micropython,ceramos/micropython,dmazzella/micropython,aethaniel/micropython,pozetroninc/micropython,HenrikSolver/micropython,vriera/micropython,mhoffma/micropython,pramasoul/micropython,AriZuu/micropython,praemdonck/micropython,emfcamp/micropython,adafruit/micropython,deshipu/micropython,micropython/micropython-esp32,neilh10/micropython,alex-march/micropython,aethaniel/micropython,dinau/micropython,Vogtinator/micropython,EcmaXp/micropython,emfcamp/micropython,firstval/micropython,warner83/micropython,lowRISC/micropython,suda/micropython,dmazzella/micropython,SungEun-Steve-Kim/test-mp,cloudformdesign/micropython,ceramos/micropython,omtinez/micropython,bvernoux/micropython,dhylands/micropython,danicampora/micropython,pfalcon/micropython,jlillest/micropython,pramasoul/micropython,hiway/micropython,supergis/micropython,adafruit/circuitpython,stonegithubs/micropython,micropython/micropython-esp32,hiway/micropython,utopiaprince/micropython,martinribelotta/micropython,PappaPeppar/micropython,dxxb/micropython,praemdonck/micropython,feilongfl/micropython,trezor/micropython,martinribelotta/micropython,kostyll/micropython,warner83/micropython,SHA2017-badge/micropython-esp32,blmorris/micropython,turbinenreiter/micropython,trezor/micropython,infinnovation/micropython,cloudformdesign/micropython,tobbad/micropython,blazewicz/micropython,matthewelse/micropython,feilongfl/micropython,martinribelotta/micropython,oopy/micropython,matthewelse/micropython,vitiral/micropython,oopy/micropython,adafruit/circuitpython,slzatz/micropython,swegener/micropython,Timmenem/micropython,ceramos/micropython,ChuckM/micropython,tuc-osg/micropython,dinau/micropython,cnoviello/micropython,jlillest/micropython,mgyenik/micropython,ahotam/micropython,skybird6672/micropython,ryannathans/micropython,henriknelson/micropython,infinnovation/micropython,oopy/micropython,dinau/micropython,matthewelse/micropython,rubencabrera/micropython,mgyenik/micropython,ericsnowcurrently/micropython,firstval/micropython,puuu/micropython,xyb/micropython,blazewicz/micropython,noahwilliamsson/micropython,blmorris/micropython,paul-xxx/micropython,ahotam/micropython,tuc-osg/micropython,vitiral/micropython,suda/micropython,hiway/micropython,MrSurly/micropython,rubencabrera/micropython,cloudformdesign/micropython,lbattraw/micropython,Vogtinator/micropython,vitiral/micropython,dxxb/micropython,praemdonck/micropython,xyb/micropython,oopy/micropython,cloudformdesign/micropython,skybird6672/micropython,utopiaprince/micropython,omtinez/micropython,pozetroninc/micropython,xyb/micropython,adafruit/circuitpython,firstval/micropython,ryannathans/micropython,cwyark/micropython,MrSurly/micropython-esp32,noahchense/micropython,skybird6672/micropython,hiway/micropython,suda/micropython,turbinenreiter/micropython,vitiral/micropython,aethaniel/micropython,paul-xxx/micropython,noahwilliamsson/micropython,misterdanb/micropython,blmorris/micropython,misterdanb/micropython,mpalomer/micropython,MrSurly/micropython-esp32,chrisdearman/micropython,emfcamp/micropython,alex-robbins/micropython,tuc-osg/micropython,ceramos/micropython,MrSurly/micropython-esp32,orionrobots/micropython,noahwilliamsson/micropython,KISSMonX/micropython,heisewangluo/micropython,noahwilliamsson/micropython,EcmaXp/micropython,supergis/micropython,xhat/micropython,lowRISC/micropython,chrisdearman/micropython,dmazzella/micropython,turbinenreiter/micropython,lbattraw/micropython,ernesto-g/micropython,pramasoul/micropython,ganshun666/micropython,pfalcon/micropython,KISSMonX/micropython,mianos/micropython,firstval/micropython,selste/micropython,martinribelotta/micropython,blazewicz/micropython,adamkh/micropython,selste/micropython,Timmenem/micropython,Timmenem/micropython,EcmaXp/micropython,Timmenem/micropython,vitiral/micropython,pozetroninc/micropython,warner83/micropython,drrk/micropython,xhat/micropython,PappaPeppar/micropython,HenrikSolver/micropython,micropython/micropython-esp32,SHA2017-badge/micropython-esp32,deshipu/micropython,rubencabrera/micropython,torwag/micropython,alex-robbins/micropython,bvernoux/micropython,xhat/micropython,jimkmc/micropython,dxxb/micropython,ernesto-g/micropython,ernesto-g/micropython,pfalcon/micropython,mgyenik/micropython,micropython/micropython-esp32,adafruit/circuitpython,jimkmc/micropython,mpalomer/micropython,alex-robbins/micropython,alex-march/micropython,adamkh/micropython,pozetroninc/micropython,kostyll/micropython,adafruit/circuitpython,Peetz0r/micropython-esp32,dhylands/micropython,supergis/micropython,ruffy91/micropython,adamkh/micropython,firstval/micropython,cnoviello/micropython,ganshun666/micropython,PappaPeppar/micropython