cpu/native/can/candev_linux: add check for real can when setting bittimings in init
cpu/native/can/candev_linux: add check for real can when setting bittimings in init

basilfx/RIOT,ant9000/RIOT,OlegHahm/RIOT,kYc0o/RIOT,authmillenon/RIOT,ant9000/RIOT,OTAkeys/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,basilfx/RIOT,miri64/RIOT,yogo1212/RIOT,kYc0o/RIOT,yogo1212/RIOT,authmillenon/RIOT,miri64/RIOT,ant9000/RIOT,OTAkeys/RIOT,yogo1212/RIOT,kYc0o/RIOT,basilfx/RIOT,kaspar030/RIOT,smlng/RIOT,kaspar030/RIOT,basilfx/RIOT,RIOT-OS/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,jasonatran/RIOT,authmillenon/RIOT,OlegHahm/RIOT,authmillenon/RIOT,basilfx/RIOT,smlng/RIOT,jasonatran/RIOT,smlng/RIOT,jasonatran/RIOT,authmillenon/RIOT,kYc0o/RIOT,kYc0o/RIOT,OlegHahm/RIOT,miri64/RIOT,smlng/RIOT,smlng/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,kaspar030/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,ant9000/RIOT,jasonatran/RIOT,yogo1212/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,kaspar030/RIOT,miri64/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,miri64/RIOT,ant9000/RIOT,yogo1212/RIOT,OlegHahm/RIOT