boards/common/nucleo: use inverted gpio for user button
boards/common/nucleo: use inverted gpio for user button

mfrey/RIOT,OlegHahm/RIOT,rfuentess/RIOT,cladmi/RIOT,biboc/RIOT,OTAkeys/RIOT,ant9000/RIOT,kaspar030/RIOT,toonst/RIOT,basilfx/RIOT,LudwigKnuepfer/RIOT,cladmi/RIOT,smlng/RIOT,mtausig/RIOT,kaspar030/RIOT,authmillenon/RIOT,lazytech-org/RIOT,cladmi/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,kYc0o/RIOT,BytesGalore/RIOT,LudwigOrtmann/RIOT,cladmi/RIOT,josephnoir/RIOT,kYc0o/RIOT,mfrey/RIOT,OTAkeys/RIOT,kbumsik/RIOT,kaspar030/RIOT,jasonatran/RIOT,ant9000/RIOT,miri64/RIOT,A-Paul/RIOT,rfuentess/RIOT,miri64/RIOT,biboc/RIOT,avmelnikoff/RIOT,OlegHahm/RIOT,jasonatran/RIOT,aeneby/RIOT,lazytech-org/RIOT,kYc0o/RIOT,neiljay/RIOT,miri64/RIOT,LudwigKnuepfer/RIOT,LudwigOrtmann/RIOT,ant9000/RIOT,RIOT-OS/RIOT,toonst/RIOT,gebart/RIOT,aeneby/RIOT,LudwigKnuepfer/RIOT,josephnoir/RIOT,lazytech-org/RIOT,kbumsik/RIOT,neiljay/RIOT,gebart/RIOT,basilfx/RIOT,rfuentess/RIOT,BytesGalore/RIOT,avmelnikoff/RIOT,ant9000/RIOT,yogo1212/RIOT,OlegHahm/RIOT,LudwigKnuepfer/RIOT,kYc0o/RIOT,rfuentess/RIOT,jasonatran/RIOT,LudwigOrtmann/RIOT,x3ro/RIOT,avmelnikoff/RIOT,biboc/RIOT,miri64/RIOT,toonst/RIOT,avmelnikoff/RIOT,kbumsik/RIOT,mtausig/RIOT,kaspar030/RIOT,authmillenon/RIOT,mfrey/RIOT,smlng/RIOT,josephnoir/RIOT,basilfx/RIOT,smlng/RIOT,RIOT-OS/RIOT,A-Paul/RIOT,lazytech-org/RIOT,A-Paul/RIOT,kYc0o/RIOT,smlng/RIOT,authmillenon/RIOT,LudwigOrtmann/RIOT,x3ro/RIOT,yogo1212/RIOT,aeneby/RIOT,lazytech-org/RIOT,OlegHahm/RIOT,aeneby/RIOT,A-Paul/RIOT,OlegHahm/RIOT,gebart/RIOT,biboc/RIOT,neiljay/RIOT,BytesGalore/RIOT,authmillenon/RIOT,gebart/RIOT,toonst/RIOT,OTAkeys/RIOT,ant9000/RIOT,gebart/RIOT,OTAkeys/RIOT,jasonatran/RIOT,BytesGalore/RIOT,josephnoir/RIOT,kaspar030/RIOT,jasonatran/RIOT,x3ro/RIOT,x3ro/RIOT,josephnoir/RIOT,yogo1212/RIOT,yogo1212/RIOT,neiljay/RIOT,yogo1212/RIOT,LudwigKnuepfer/RIOT,OTAkeys/RIOT,mtausig/RIOT,mfrey/RIOT,miri64/RIOT,avmelnikoff/RIOT,neiljay/RIOT,toonst/RIOT,RIOT-OS/RIOT,kbumsik/RIOT,LudwigOrtmann/RIOT,mtausig/RIOT,kbumsik/RIOT,A-Paul/RIOT,rfuentess/RIOT,basilfx/RIOT,cladmi/RIOT,smlng/RIOT,x3ro/RIOT,basilfx/RIOT,authmillenon/RIOT,authmillenon/RIOT,mtausig/RIOT,LudwigOrtmann/RIOT,mfrey/RIOT,BytesGalore/RIOT,biboc/RIOT,aeneby/RIOT,RIOT-OS/RIOT