Update OpenMote board header file to define UPDATE_CCA.
Update OpenMote board header file to define UPDATE_CCA.

As per the cc2538dk and ReMote boards. This enables the cc2538's
bootloader backdoor, to allow flashing via the serial interface even
when a valid image is already present.

Backdoor enable is set to LOW, PORT A, PIN 6 (ON/SLEEP on the OpenBase),
for consistency with the default OpenMote firmware.

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