MAINTAINERS: add entry for Rockchip drm drivers
MAINTAINERS: add entry for Rockchip drm drivers

Mark Yao looks after the Rockchip drm drivers and should thus also get
patches touching these.

Signed-off-by: Heiko Stuebner <9ab5f52a1ca0bcf4f70d6d9008e02f6134b5b8f2@sntech.de>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs