stmhal/hal: do not include <stdio.h> in HAL headers
stmhal/hal: do not include <stdio.h> in HAL headers

stdio.h was included in all HAL files only to provide
definition of NULL symbol

"stdio.h" includes "types.h" which contains some conflicting definitions
with "drivers/cc3000/inc/socket.h"

infinnovation/micropython,blazewicz/micropython,deshipu/micropython,Timmenem/micropython,Peetz0r/micropython-esp32,MrSurly/micropython,chrisdearman/micropython,SHA2017-badge/micropython-esp32,pfalcon/micropython,tuc-osg/micropython,Peetz0r/micropython-esp32,bvernoux/micropython,hiway/micropython,mhoffma/micropython,TDAbboud/micropython,bvernoux/micropython,dmazzella/micropython,adafruit/circuitpython,toolmacher/micropython,selste/micropython,MrSurly/micropython,henriknelson/micropython,MrSurly/micropython-esp32,hiway/micropython,ryannathans/micropython,tobbad/micropython,pozetroninc/micropython,micropython/micropython-esp32,trezor/micropython,pramasoul/micropython,cwyark/micropython,mhoffma/micropython,tralamazza/micropython,bvernoux/micropython,chrisdearman/micropython,selste/micropython,SHA2017-badge/micropython-esp32,kerneltask/micropython,SHA2017-badge/micropython-esp32,cwyark/micropython,TDAbboud/micropython,adafruit/micropython,Peetz0r/micropython-esp32,torwag/micropython,tobbad/micropython,bvernoux/micropython,puuu/micropython,cwyark/micropython,pramasoul/micropython,toolmacher/micropython,alex-robbins/micropython,tobbad/micropython,TDAbboud/micropython,AriZuu/micropython,tralamazza/micropython,adafruit/circuitpython,chrisdearman/micropython,selste/micropython,torwag/micropython,MrSurly/micropython-esp32,lowRISC/micropython,blazewicz/micropython,Timmenem/micropython,MrSurly/micropython,AriZuu/micropython,SHA2017-badge/micropython-esp32,oopy/micropython,lowRISC/micropython,lowRISC/micropython,oopy/micropython,tuc-osg/micropython,dmazzella/micropython,henriknelson/micropython,HenrikSolver/micropython,adafruit/micropython,puuu/micropython,HenrikSolver/micropython,deshipu/micropython,alex-robbins/micropython,torwag/micropython,swegener/micropython,kerneltask/micropython,pramasoul/micropython,ryannathans/micropython,MrSurly/micropython,trezor/micropython,oopy/micropython,MrSurly/micropython-esp32,micropython/micropython-esp32,pfalcon/micropython,chrisdearman/micropython,pfalcon/micropython,trezor/micropython,hiway/micropython,micropython/micropython-esp32,micropython/micropython-esp32,micropython/micropython-esp32,blazewicz/micropython,TDAbboud/micropython,henriknelson/micropython,mhoffma/micropython,PappaPeppar/micropython,Peetz0r/micropython-esp32,selste/micropython,lowRISC/micropython,ryannathans/micropython,pozetroninc/micropython,chrisdearman/micropython,alex-robbins/micropython,adafruit/micropython,adafruit/circuitpython,oopy/micropython,kerneltask/micropython,AriZuu/micropython,pozetroninc/micropython,adafruit/circuitpython,deshipu/micropython,toolmacher/micropython,MrSurly/micropython-esp32,torwag/micropython,kerneltask/micropython,hiway/micropython,HenrikSolver/micropython,AriZuu/micropython,tobbad/micropython,SHA2017-badge/micropython-esp32,trezor/micropython,AriZuu/micropython,blazewicz/micropython,torwag/micropython,toolmacher/micropython,deshipu/micropython,tobbad/micropython,lowRISC/micropython,adafruit/circuitpython,toolmacher/micropython,alex-robbins/micropython,alex-robbins/micropython,mhoffma/micropython,adafruit/micropython,pfalcon/micropython,TDAbboud/micropython,dmazzella/micropython,puuu/micropython,ryannathans/micropython,PappaPeppar/micropython,cwyark/micropython,PappaPeppar/micropython,dmazzella/micropython,tralamazza/micropython,henriknelson/micropython,swegener/micropython,pramasoul/micropython,puuu/micropython,infinnovation/micropython,Timmenem/micropython,MrSurly/micropython,pramasoul/micropython,kerneltask/micropython,mhoffma/micropython,infinnovation/micropython,Timmenem/micropython,adafruit/circuitpython,tuc-osg/micropython,trezor/micropython,HenrikSolver/micropython,tuc-osg/micropython,pfalcon/micropython,swegener/micropython,hiway/micropython,oopy/micropython,MrSurly/micropython-esp32,swegener/micropython,infinnovation/micropython,bvernoux/micropython,henriknelson/micropython,tralamazza/micropython,Timmenem/micropython,pozetroninc/micropython,HenrikSolver/micropython,tuc-osg/micropython,blazewicz/micropython,adafruit/micropython,cwyark/micropython,Peetz0r/micropython-esp32,PappaPeppar/micropython,PappaPeppar/micropython,puuu/micropython,infinnovation/micropython,selste/micropython,swegener/micropython,pozetroninc/micropython,deshipu/micropython,ryannathans/micropython