tests/disp_dev: add Kconfig config
tests/disp_dev: add Kconfig config

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