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 <heiko@sntech.de>

MAINTAINERS

@@ -3398,6 +3398,13 @@ F:	drivers/gpu/drm/rcar-du/
 F:	drivers/gpu/drm/shmobile/
 F:	include/linux/platform_data/shmob_drm.h
 
+DRM DRIVERS FOR ROCKCHIP
+M:	Mark Yao <mark.yao@rock-chips.com>
+L:	dri-devel@lists.freedesktop.org
+S:	Maintained
+F:	drivers/gpu/drm/rockchip/
+F:	Documentation/devicetree/bindings/video/rockchip*
+
 DSBR100 USB FM RADIO DRIVER
 M:	Alexey Klimov <klimov.linux@gmail.com>
 L:	linux-media@vger.kernel.org