Support flashing openmote-cc2538 board via serial interface
Support flashing openmote-cc2538 board via serial interface

Enable directly from Makefile target 'flash' using cc2538-bsl script,
and make this the default flashing method for this platform.

jasonatran/RIOT,rakendrathapa/RIOT,neumodisch/RIOT,toonst/RIOT,beurdouche/RIOT,BytesGalore/RIOT,FrancescoErmini/RIOT,katezilla/RIOT,shady33/RIOT,immesys/RiSyn,jremmert-phytec-iot/RIOT,cladmi/RIOT,neiljay/RIOT,biboc/RIOT,beurdouche/RIOT,rajma996/RIOT,adrianghc/RIOT,MohmadAyman/RIOT,kbumsik/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,kaspar030/RIOT,tfar/RIOT,wentaoshang/RIOT,kb2ma/RIOT,wentaoshang/RIOT,yogo1212/RIOT,rfuentess/RIOT,kb2ma/RIOT,wentaoshang/RIOT,jfischer-phytec-iot/RIOT,kaleb-himes/RIOT,hamilton-mote/RIOT-OS,rousselk/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,thomaseichinger/RIOT,neumodisch/RIOT,x3ro/RIOT,adjih/RIOT,OTAkeys/RIOT,altairpearl/RIOT,asanka-code/RIOT,ks156/RIOT,plushvoxel/RIOT,adjih/RIOT,backenklee/RIOT,attdona/RIOT,kYc0o/RIOT,lazytech-org/RIOT,jbeyerstedt/RIOT-OTA-update,basilfx/RIOT,d00616/RIOT,alignan/RIOT,rajma996/RIOT,OTAkeys/RIOT,neiljay/RIOT,rajma996/RIOT,dkm/RIOT,d00616/RIOT,katezilla/RIOT,mfrey/RIOT,syin2/RIOT,kerneltask/RIOT,rousselk/RIOT,toonst/RIOT,beurdouche/RIOT,cladmi/RIOT,lazytech-org/RIOT,OTAkeys/RIOT,josephnoir/RIOT,mtausig/RIOT,rakendrathapa/RIOT,kYc0o/RIOT,biboc/RIOT,FrancescoErmini/RIOT,ant9000/RIOT,jbeyerstedt/RIOT-OTA-update,ks156/RIOT,roberthartung/RIOT,BytesGalore/RIOT,hamilton-mote/RIOT-OS,OTAkeys/RIOT,tfar/RIOT,neiljay/RIOT,attdona/RIOT,LudwigOrtmann/RIOT,Ell-i/RIOT,rousselk/RIOT,plushvoxel/RIOT,jremmert-phytec-iot/RIOT,rajma996/RIOT,jasonatran/RIOT,alignan/RIOT,altairpearl/RIOT,A-Paul/RIOT,immesys/RiSyn,asanka-code/RIOT,TobiasFredersdorf/RIOT,brettswann/RIOT,kbumsik/RIOT,Ell-i/RIOT,hamilton-mote/RIOT-OS,adjih/RIOT,shady33/RIOT,mfrey/RIOT,x3ro/RIOT,cladmi/RIOT,josephnoir/RIOT,attdona/RIOT,gautric/RIOT,yogo1212/RIOT,authmillenon/RIOT,brettswann/RIOT,toonst/RIOT,MohmadAyman/RIOT,gautric/RIOT,smlng/RIOT,yogo1212/RIOT,josephnoir/RIOT,miri64/RIOT,MohmadAyman/RIOT,aeneby/RIOT,OlegHahm/RIOT,immesys/RiSyn,avmelnikoff/RIOT,TobiasFredersdorf/RIOT,basilfx/RIOT,RIOT-OS/RIOT,wentaoshang/RIOT,wentaoshang/RIOT,tfar/RIOT,TobiasFredersdorf/RIOT,adjih/RIOT,thomaseichinger/RIOT,rfuentess/RIOT,backenklee/RIOT,aeneby/RIOT,kaleb-himes/RIOT,Hyungsin/RIOT-OS,authmillenon/RIOT,dkm/RIOT,Ell-i/RIOT,jbeyerstedt/RIOT-OTA-update,malosek/RIOT,malosek/RIOT,jbeyerstedt/RIOT-OTA-update,adrianghc/RIOT,gautric/RIOT,kYc0o/RIOT,roberthartung/RIOT,OlegHahm/RIOT,LudwigOrtmann/RIOT,dailab/RIOT,zhuoshuguo/RIOT,asanka-code/RIOT,d00616/RIOT,x3ro/RIOT,lazytech-org/RIOT,kbumsik/RIOT,x3ro/RIOT,cladmi/RIOT,thomaseichinger/RIOT,rousselk/RIOT,d00616/RIOT,alignan/RIOT,backenklee/RIOT,zhuoshuguo/RIOT,lazytech-org/RIOT,yogo1212/RIOT,miri64/RIOT,yogo1212/RIOT,kerneltask/RIOT,smlng/RIOT,rakendrathapa/RIOT,RIOT-OS/RIOT,jbeyerstedt/RIOT-OTA-update,asanka-code/RIOT,mfrey/RIOT,josephnoir/RIOT,kaleb-himes/RIOT,Ell-i/RIOT,rajma996/RIOT,rakendrathapa/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,cladmi/RIOT,adrianghc/RIOT,kaspar030/RIOT,gautric/RIOT,RIOT-OS/RIOT,ant9000/RIOT,gebart/RIOT,Josar/RIOT,dailab/RIOT,x3ro/RIOT,ant9000/RIOT,immesys/RiSyn,Hyungsin/RIOT-OS,rfuentess/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,adrianghc/RIOT,brettswann/RIOT,mtausig/RIOT,mfrey/RIOT,aeneby/RIOT,jfischer-phytec-iot/RIOT,adjih/RIOT,ks156/RIOT,MohmadAyman/RIOT,OlegHahm/RIOT,dailab/RIOT,Josar/RIOT,plushvoxel/RIOT,LudwigOrtmann/RIOT,miri64/RIOT,LudwigOrtmann/RIOT,aeneby/RIOT,biboc/RIOT,zhuoshuguo/RIOT,mtausig/RIOT,gautric/RIOT,OlegHahm/RIOT,rfuentess/RIOT,miri64/RIOT,A-Paul/RIOT,basilfx/RIOT,gebart/RIOT,Josar/RIOT,asanka-code/RIOT,smlng/RIOT,roberthartung/RIOT,rakendrathapa/RIOT,avmelnikoff/RIOT,altairpearl/RIOT,altairpearl/RIOT,authmillenon/RIOT,TobiasFredersdorf/RIOT,basilfx/RIOT,neumodisch/RIOT,beurdouche/RIOT,RIOT-OS/RIOT,A-Paul/RIOT,kaspar030/RIOT,kbumsik/RIOT,plushvoxel/RIOT,katezilla/RIOT,toonst/RIOT,wentaoshang/RIOT,jasonatran/RIOT,rfuentess/RIOT,kb2ma/RIOT,LudwigOrtmann/RIOT,neumodisch/RIOT,roberthartung/RIOT,ks156/RIOT,shady33/RIOT,jremmert-phytec-iot/RIOT,neiljay/RIOT,d00616/RIOT,authmillenon/RIOT,authmillenon/RIOT,rousselk/RIOT,Josar/RIOT,RIOT-OS/RIOT,syin2/RIOT,smlng/RIOT,altairpearl/RIOT,neiljay/RIOT,jremmert-phytec-iot/RIOT,A-Paul/RIOT,syin2/RIOT,syin2/RIOT,LudwigKnuepfer/RIOT,syin2/RIOT,MohmadAyman/RIOT,lazytech-org/RIOT,A-Paul/RIOT,shady33/RIOT,kaspar030/RIOT,jremmert-phytec-iot/RIOT,LudwigKnuepfer/RIOT,zhuoshuguo/RIOT,OTAkeys/RIOT,yogo1212/RIOT,rakendrathapa/RIOT,neumodisch/RIOT,TobiasFredersdorf/RIOT,gebart/RIOT,biboc/RIOT,jremmert-phytec-iot/RIOT,malosek/RIOT,aeneby/RIOT,adrianghc/RIOT,kbumsik/RIOT,LudwigKnuepfer/RIOT,alignan/RIOT,jfischer-phytec-iot/RIOT,dkm/RIOT,backenklee/RIOT,kaleb-himes/RIOT,neumodisch/RIOT,beurdouche/RIOT,shady33/RIOT,rajma996/RIOT,LudwigKnuepfer/RIOT,kb2ma/RIOT,roberthartung/RIOT,LudwigOrtmann/RIOT,hamilton-mote/RIOT-OS,thomaseichinger/RIOT,avmelnikoff/RIOT,jasonatran/RIOT,dkm/RIOT,FrancescoErmini/RIOT,gebart/RIOT,mtausig/RIOT,rousselk/RIOT,kaleb-himes/RIOT,ant9000/RIOT,MohmadAyman/RIOT,avmelnikoff/RIOT,malosek/RIOT,toonst/RIOT,BytesGalore/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,kerneltask/RIOT,dailab/RIOT,avmelnikoff/RIOT,hamilton-mote/RIOT-OS,FrancescoErmini/RIOT,backenklee/RIOT,dailab/RIOT,jfischer-phytec-iot/RIOT,alignan/RIOT,brettswann/RIOT,tfar/RIOT,d00616/RIOT,kerneltask/RIOT,Josar/RIOT,biboc/RIOT,BytesGalore/RIOT,immesys/RiSyn,katezilla/RIOT,kYc0o/RIOT,brettswann/RIOT,immesys/RiSyn,attdona/RIOT,jfischer-phytec-iot/RIOT,asanka-code/RIOT,ant9000/RIOT,thomaseichinger/RIOT,kYc0o/RIOT,FrancescoErmini/RIOT,gebart/RIOT,kerneltask/RIOT,attdona/RIOT,Hyungsin/RIOT-OS,authmillenon/RIOT,josephnoir/RIOT,mtausig/RIOT,mfrey/RIOT,zhuoshuguo/RIOT,basilfx/RIOT,LudwigKnuepfer/RIOT,miri64/RIOT,Hyungsin/RIOT-OS,shady33/RIOT,kb2ma/RIOT,kaspar030/RIOT,attdona/RIOT,smlng/RIOT,jasonatran/RIOT,Hyungsin/RIOT-OS,Ell-i/RIOT,OlegHahm/RIOT,dkm/RIOT,katezilla/RIOT,brettswann/RIOT,tfar/RIOT,malosek/RIOT,ks156/RIOT,BytesGalore/RIOT,zhuoshuguo/RIOT,FrancescoErmini/RIOT,plushvoxel/RIOT,malosek/RIOT,altairpearl/RIOT