boards/samr30-xpro: add SPI dev for ext pin header
boards/samr30-xpro: add SPI dev for ext pin header

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