MAINTAINERS: add an entry for ZTE ZX DRM driver

Add myself as the maintainer of ZTE ZX DRM driver.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

MAINTAINERS

@@ -4281,6 +4281,13 @@ S:	Maintained
 F:	drivers/gpu/drm/tilcdc/
 F:	Documentation/devicetree/bindings/display/tilcdc/
 
+DRM DRIVERS FOR ZTE ZX
+M:	Shawn Guo <shawnguo@kernel.org>
+L:	dri-devel@lists.freedesktop.org
+S:	Maintained
+F:	drivers/gpu/drm/zte/
+F:	Documentation/devicetree/bindings/display/zte,vou.txt
+
 DSBR100 USB FM RADIO DRIVER
 M:	Alexey Klimov <klimov.linux@gmail.com>
 L:	linux-media@vger.kernel.org