boards/stm32f0discovery: adapt clock configuration
boards/stm32f0discovery: adapt clock configuration

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