MAINTAINERS: Add myself as maintainer for the gma500 driver

Signed-off-by: Patrik Jakobsson <[e-mail]>
Signed-off-by: Dave Airlie <[e-mail]>

MAINTAINERS

···
 F:	drivers/gpu/drm/imx/
 F:	Documentation/devicetree/bindings/drm/imx/
 
+DRM DRIVERS FOR GMA500 (Poulsbo, Moorestown and derivative chipsets)
+M:	Patrik Jakobsson <[e-mail]>
+L:	[e-mail]
+T:	git git://github.com/patjak/drm-gma500
+S:	Maintained
+F:	drivers/gpu/drm/gma500
+F:	include/drm/gma500*
+
 DRM DRIVERS FOR NVIDIA TEGRA
 M:	Thierry Reding <[e-mail]>
 M:	Terje Bergström <[e-mail]>