cpu: efm32: add support for no DC-DC converter
cpu: efm32: add support for no DC-DC converter

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