cpu/efm32: provide arch_efm32 features
cpu/efm32: provide arch_efm32 features

yogo1212/RIOT,kYc0o/RIOT,authmillenon/RIOT,josephnoir/RIOT,jasonatran/RIOT,aeneby/RIOT,OTAkeys/RIOT,miri64/RIOT,toonst/RIOT,kYc0o/RIOT,ant9000/RIOT,OTAkeys/RIOT,jasonatran/RIOT,basilfx/RIOT,mtausig/RIOT,smlng/RIOT,OlegHahm/RIOT,authmillenon/RIOT,smlng/RIOT,josephnoir/RIOT,mtausig/RIOT,basilfx/RIOT,miri64/RIOT,miri64/RIOT,RIOT-OS/RIOT,x3ro/RIOT,yogo1212/RIOT,basilfx/RIOT,aeneby/RIOT,basilfx/RIOT,toonst/RIOT,OlegHahm/RIOT,kYc0o/RIOT,toonst/RIOT,kYc0o/RIOT,kaspar030/RIOT,ant9000/RIOT,smlng/RIOT,mtausig/RIOT,x3ro/RIOT,authmillenon/RIOT,x3ro/RIOT,kYc0o/RIOT,yogo1212/RIOT,jasonatran/RIOT,OlegHahm/RIOT,josephnoir/RIOT,miri64/RIOT,x3ro/RIOT,kaspar030/RIOT,authmillenon/RIOT,x3ro/RIOT,OTAkeys/RIOT,ant9000/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,mtausig/RIOT,OlegHahm/RIOT,jasonatran/RIOT,yogo1212/RIOT,josephnoir/RIOT,aeneby/RIOT,RIOT-OS/RIOT,ant9000/RIOT,miri64/RIOT,toonst/RIOT,yogo1212/RIOT,jasonatran/RIOT,authmillenon/RIOT,josephnoir/RIOT,toonst/RIOT,yogo1212/RIOT,aeneby/RIOT,OlegHahm/RIOT,kaspar030/RIOT,kaspar030/RIOT,aeneby/RIOT,OTAkeys/RIOT,basilfx/RIOT,kaspar030/RIOT,mtausig/RIOT,ant9000/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,smlng/RIOT,smlng/RIOT