drivers/rgbled: fix PWM resolution
drivers/rgbled: fix PWM resolution

josephnoir/RIOT,yogo1212/RIOT,kbumsik/RIOT,adrianghc/RIOT,A-Paul/RIOT,LudwigOrtmann/RIOT,RIOT-OS/RIOT,BytesGalore/RIOT,RIOT-OS/RIOT,LudwigKnuepfer/RIOT,ks156/RIOT,x3ro/RIOT,kaspar030/RIOT,ks156/RIOT,toonst/RIOT,neiljay/RIOT,avmelnikoff/RIOT,basilfx/RIOT,kbumsik/RIOT,LudwigOrtmann/RIOT,roberthartung/RIOT,biboc/RIOT,BytesGalore/RIOT,miri64/RIOT,kbumsik/RIOT,rfuentess/RIOT,biboc/RIOT,mfrey/RIOT,kbumsik/RIOT,OTAkeys/RIOT,authmillenon/RIOT,cladmi/RIOT,mtausig/RIOT,OlegHahm/RIOT,authmillenon/RIOT,mfrey/RIOT,josephnoir/RIOT,kaspar030/RIOT,miri64/RIOT,kYc0o/RIOT,toonst/RIOT,A-Paul/RIOT,kYc0o/RIOT,mtausig/RIOT,basilfx/RIOT,authmillenon/RIOT,OlegHahm/RIOT,LudwigOrtmann/RIOT,yogo1212/RIOT,Josar/RIOT,kYc0o/RIOT,kYc0o/RIOT,gebart/RIOT,gebart/RIOT,BytesGalore/RIOT,OlegHahm/RIOT,LudwigKnuepfer/RIOT,yogo1212/RIOT,neiljay/RIOT,jasonatran/RIOT,A-Paul/RIOT,lazytech-org/RIOT,smlng/RIOT,yogo1212/RIOT,kaspar030/RIOT,LudwigOrtmann/RIOT,cladmi/RIOT,basilfx/RIOT,LudwigOrtmann/RIOT,gebart/RIOT,A-Paul/RIOT,mtausig/RIOT,BytesGalore/RIOT,A-Paul/RIOT,ant9000/RIOT,avmelnikoff/RIOT,ant9000/RIOT,yogo1212/RIOT,yogo1212/RIOT,ks156/RIOT,aeneby/RIOT,mfrey/RIOT,Josar/RIOT,mfrey/RIOT,authmillenon/RIOT,rfuentess/RIOT,jasonatran/RIOT,LudwigOrtmann/RIOT,toonst/RIOT,neiljay/RIOT,roberthartung/RIOT,lazytech-org/RIOT,avmelnikoff/RIOT,x3ro/RIOT,OTAkeys/RIOT,smlng/RIOT,Josar/RIOT,cladmi/RIOT,smlng/RIOT,toonst/RIOT,LudwigKnuepfer/RIOT,ant9000/RIOT,x3ro/RIOT,lazytech-org/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,adrianghc/RIOT,OTAkeys/RIOT,biboc/RIOT,BytesGalore/RIOT,smlng/RIOT,x3ro/RIOT,LudwigKnuepfer/RIOT,biboc/RIOT,authmillenon/RIOT,kYc0o/RIOT,roberthartung/RIOT,miri64/RIOT,OlegHahm/RIOT,adrianghc/RIOT,Josar/RIOT,josephnoir/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,aeneby/RIOT,miri64/RIOT,kbumsik/RIOT,rfuentess/RIOT,gebart/RIOT,adrianghc/RIOT,aeneby/RIOT,immesys/RiSyn,mtausig/RIOT,immesys/RiSyn,toonst/RIOT,OlegHahm/RIOT,cladmi/RIOT,adrianghc/RIOT,ant9000/RIOT,Josar/RIOT,basilfx/RIOT,neiljay/RIOT,josephnoir/RIOT,authmillenon/RIOT,lazytech-org/RIOT,aeneby/RIOT,roberthartung/RIOT,ks156/RIOT,rfuentess/RIOT,x3ro/RIOT,avmelnikoff/RIOT,roberthartung/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,immesys/RiSyn,kaspar030/RIOT,immesys/RiSyn,LudwigKnuepfer/RIOT,rfuentess/RIOT,basilfx/RIOT,lazytech-org/RIOT,josephnoir/RIOT,ant9000/RIOT,neiljay/RIOT,biboc/RIOT,immesys/RiSyn,avmelnikoff/RIOT,gebart/RIOT,aeneby/RIOT,smlng/RIOT,ks156/RIOT,kaspar030/RIOT,miri64/RIOT,cladmi/RIOT,jasonatran/RIOT,mtausig/RIOT,immesys/RiSyn,OTAkeys/RIOT,mfrey/RIOT