boards/calliope-mini: use common clock config
boards/calliope-mini: use common clock config

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