boards/nucleo_common: remove extra underscore in header guard
boards/nucleo_common: remove extra underscore in header guard

A-Paul/RIOT,plushvoxel/RIOT,beurdouche/RIOT,immesys/RiSyn,roberthartung/RIOT,Hyungsin/RIOT-OS,neiljay/RIOT,LudwigKnuepfer/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,Hyungsin/RIOT-OS,lazytech-org/RIOT,biboc/RIOT,LudwigKnuepfer/RIOT,kaleb-himes/RIOT,RIOT-OS/RIOT,miri64/RIOT,x3ro/RIOT,x3ro/RIOT,immesys/RiSyn,lazytech-org/RIOT,kbumsik/RIOT,Ell-i/RIOT,yogo1212/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,hamilton-mote/RIOT-OS,hamilton-mote/RIOT-OS,Ell-i/RIOT,kaleb-himes/RIOT,OTAkeys/RIOT,kaspar030/RIOT,kYc0o/RIOT,plushvoxel/RIOT,ant9000/RIOT,TobiasFredersdorf/RIOT,neumodisch/RIOT,toonst/RIOT,TobiasFredersdorf/RIOT,basilfx/RIOT,miri64/RIOT,hamilton-mote/RIOT-OS,authmillenon/RIOT,A-Paul/RIOT,hamilton-mote/RIOT-OS,jasonatran/RIOT,Ell-i/RIOT,mfrey/RIOT,RIOT-OS/RIOT,josephnoir/RIOT,OTAkeys/RIOT,neumodisch/RIOT,toonst/RIOT,adjih/RIOT,kaleb-himes/RIOT,gebart/RIOT,thomaseichinger/RIOT,gebart/RIOT,hamilton-mote/RIOT-OS,dailab/RIOT,BytesGalore/RIOT,aeneby/RIOT,jbeyerstedt/RIOT-OTA-update,plushvoxel/RIOT,beurdouche/RIOT,jbeyerstedt/RIOT-OTA-update,kaleb-himes/RIOT,x3ro/RIOT,lazytech-org/RIOT,mfrey/RIOT,kaspar030/RIOT,Hyungsin/RIOT-OS,adjih/RIOT,yogo1212/RIOT,gautric/RIOT,LudwigKnuepfer/RIOT,rfuentess/RIOT,RIOT-OS/RIOT,Josar/RIOT,OTAkeys/RIOT,yogo1212/RIOT,cladmi/RIOT,rfuentess/RIOT,BytesGalore/RIOT,ks156/RIOT,LudwigOrtmann/RIOT,syin2/RIOT,thomaseichinger/RIOT,neiljay/RIOT,yogo1212/RIOT,kbumsik/RIOT,josephnoir/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,TobiasFredersdorf/RIOT,OlegHahm/RIOT,aeneby/RIOT,adrianghc/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,jfischer-phytec-iot/RIOT,jasonatran/RIOT,immesys/RiSyn,kaleb-himes/RIOT,adrianghc/RIOT,jfischer-phytec-iot/RIOT,A-Paul/RIOT,yogo1212/RIOT,LudwigOrtmann/RIOT,dkm/RIOT,syin2/RIOT,beurdouche/RIOT,plushvoxel/RIOT,mtausig/RIOT,kbumsik/RIOT,cladmi/RIOT,kaspar030/RIOT,neumodisch/RIOT,OlegHahm/RIOT,dkm/RIOT,yogo1212/RIOT,LudwigOrtmann/RIOT,A-Paul/RIOT,cladmi/RIOT,jfischer-phytec-iot/RIOT,neumodisch/RIOT,avmelnikoff/RIOT,BytesGalore/RIOT,rfuentess/RIOT,kYc0o/RIOT,LudwigOrtmann/RIOT,kerneltask/RIOT,ant9000/RIOT,jbeyerstedt/RIOT-OTA-update,mtausig/RIOT,toonst/RIOT,syin2/RIOT,LudwigKnuepfer/RIOT,roberthartung/RIOT,Josar/RIOT,avmelnikoff/RIOT,BytesGalore/RIOT,rfuentess/RIOT,dailab/RIOT,rfuentess/RIOT,kbumsik/RIOT,avmelnikoff/RIOT,basilfx/RIOT,basilfx/RIOT,gautric/RIOT,OlegHahm/RIOT,smlng/RIOT,roberthartung/RIOT,jasonatran/RIOT,OlegHahm/RIOT,Ell-i/RIOT,josephnoir/RIOT,Hyungsin/RIOT-OS,ks156/RIOT,OTAkeys/RIOT,Josar/RIOT,Hyungsin/RIOT-OS,BytesGalore/RIOT,dailab/RIOT,ks156/RIOT,jbeyerstedt/RIOT-OTA-update,gautric/RIOT,x3ro/RIOT,A-Paul/RIOT,lazytech-org/RIOT,Ell-i/RIOT,beurdouche/RIOT,mfrey/RIOT,miri64/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,immesys/RiSyn,dkm/RIOT,basilfx/RIOT,mtausig/RIOT,thomaseichinger/RIOT,syin2/RIOT,ant9000/RIOT,kerneltask/RIOT,smlng/RIOT,josephnoir/RIOT,gautric/RIOT,adrianghc/RIOT,TobiasFredersdorf/RIOT,jfischer-phytec-iot/RIOT,smlng/RIOT,avmelnikoff/RIOT,kaspar030/RIOT,kYc0o/RIOT,roberthartung/RIOT,toonst/RIOT,jfischer-phytec-iot/RIOT,thomaseichinger/RIOT,miri64/RIOT,gautric/RIOT,mfrey/RIOT,aeneby/RIOT,syin2/RIOT,TobiasFredersdorf/RIOT,RIOT-OS/RIOT,smlng/RIOT,neumodisch/RIOT,aeneby/RIOT,thomaseichinger/RIOT,gebart/RIOT,mtausig/RIOT,miri64/RIOT,immesys/RiSyn,OTAkeys/RIOT,toonst/RIOT,neiljay/RIOT,kYc0o/RIOT,jasonatran/RIOT,authmillenon/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,dailab/RIOT,authmillenon/RIOT,cladmi/RIOT,ks156/RIOT,LudwigKnuepfer/RIOT,plushvoxel/RIOT,avmelnikoff/RIOT,mtausig/RIOT,neiljay/RIOT,LudwigOrtmann/RIOT,gebart/RIOT,immesys/RiSyn,kerneltask/RIOT,jbeyerstedt/RIOT-OTA-update,dkm/RIOT,kerneltask/RIOT,kaspar030/RIOT,mfrey/RIOT,Josar/RIOT,josephnoir/RIOT,dkm/RIOT,Josar/RIOT,adjih/RIOT,aeneby/RIOT,adjih/RIOT,adrianghc/RIOT,gebart/RIOT,biboc/RIOT,x3ro/RIOT,roberthartung/RIOT,dailab/RIOT,smlng/RIOT,jasonatran/RIOT,biboc/RIOT,adrianghc/RIOT,ant9000/RIOT,cladmi/RIOT,neumodisch/RIOT,beurdouche/RIOT,authmillenon/RIOT,ks156/RIOT,OlegHahm/RIOT,ant9000/RIOT,biboc/RIOT,kYc0o/RIOT,lazytech-org/RIOT,adjih/RIOT,kbumsik/RIOT,LudwigOrtmann/RIOT,kerneltask/RIOT,authmillenon/RIOT,neiljay/RIOT,basilfx/RIOT,biboc/RIOT