MAINTAINERS: add a maintainer for the atmel-hlcdc DRM driver

Add myself as the maintainer of the atmel-hlcdc DRM driver.

Signed-off-by: Boris Brezillon <[e-mail]>
Acked-by: Nicolas Ferre <[e-mail]>
Signed-off-by: Dave Airlie <[e-mail]>

MAINTAINERS

···
 F:	include/drm/i915*
 F:	include/uapi/drm/i915*
 
+DRM DRIVERS FOR ATMEL HLCDC
+M:	Boris Brezillon <[e-mail]>
+L:	[e-mail]
+S:	Supported
+F:	drivers/gpu/drm/atmel-hlcdc/
+F:	Documentation/devicetree/bindings/drm/atmel/
+
 DRM DRIVERS FOR EXYNOS
 M:	Inki Dae <[e-mail]>
 M:	Joonyoung Shim <[e-mail]>