cpu/cortexm_common/Kconfig: add cortexm_svc feature
cpu/cortexm_common/Kconfig: add cortexm_svc feature

OlegHahm/RIOT,kYc0o/RIOT,authmillenon/RIOT,jasonatran/RIOT,kaspar030/RIOT,miri64/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,basilfx/RIOT,ant9000/RIOT,basilfx/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,kaspar030/RIOT,jasonatran/RIOT,ant9000/RIOT,authmillenon/RIOT,miri64/RIOT,OlegHahm/RIOT,basilfx/RIOT,ant9000/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,miri64/RIOT,miri64/RIOT,authmillenon/RIOT,OTAkeys/RIOT,authmillenon/RIOT,authmillenon/RIOT,basilfx/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,RIOT-OS/RIOT,miri64/RIOT,kaspar030/RIOT,ant9000/RIOT,OlegHahm/RIOT,kYc0o/RIOT,kYc0o/RIOT,OTAkeys/RIOT,basilfx/RIOT,jasonatran/RIOT,OTAkeys/RIOT,jasonatran/RIOT,kaspar030/RIOT,kYc0o/RIOT,OTAkeys/RIOT,ant9000/RIOT,OlegHahm/RIOT,jasonatran/RIOT