boards/sodaq-sara-aff: Add board specific Kconfig symbols
boards/sodaq-sara-aff: Add board specific Kconfig symbols

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