MAINTAINERS: Update HISILICON DRM entries

Signed-off-by: Rongrong Zou <zourongrong@gmail.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Xinliang Liu <xinliang.liu@linaro.org>
Acked-by: Sean Paul <seanpaul@chromium.org>

MAINTAINERS

@@ -4134,6 +4134,7 @@ F:	drivers/gpu/drm/gma500/
 
 DRM DRIVERS FOR HISILICON
 M:	Xinliang Liu <z.liuxinliang@hisilicon.com>
+M:	Rongrong Zou <zourongrong@gmail.com>
 R:	Xinwei Kong <kong.kongxinwei@hisilicon.com>
 R:	Chen Feng <puck.chen@hisilicon.com>
 L:	dri-devel@lists.freedesktop.org