MAINTAINER: Create entry for Renesas SH-Mobile DRM drivers

Split off DRM drivers for Renesas SH-Mobile into its own entry, and add
Geert Uytterhoeven as a maintainer.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/7cbcec72214886b67afa8d724a9245661d8cd675.1694767208.git.geert+renesas@glider.be

MAINTAINERS

@@ -7016,7 +7016,7 @@ F:	drivers/gpu/host1x/
 F:	include/linux/host1x.h
 F:	include/uapi/drm/tegra_drm.h
 
-DRM DRIVERS FOR RENESAS
+DRM DRIVERS FOR RENESAS R-CAR
 M:	Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 M:	Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
 L:	dri-devel@lists.freedesktop.org
@@ -7027,7 +7027,15 @@ F:	Documentation/devicetree/bindings/display/bridge/renesas,dsi-csi2-tx.yaml
 F:	Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.yaml
 F:	Documentation/devicetree/bindings/display/bridge/renesas,lvds.yaml
 F:	Documentation/devicetree/bindings/display/renesas,du.yaml
-F:	drivers/gpu/drm/renesas/
+F:	drivers/gpu/drm/renesas/rcar-du/
+
+DRM DRIVERS FOR RENESAS SHMOBILE
+M:	Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+M:	Geert Uytterhoeven <geert+renesas@glider.be>
+L:	dri-devel@lists.freedesktop.org
+L:	linux-renesas-soc@vger.kernel.org
+S:	Supported
+F:	drivers/gpu/drm/renesas/shmobile/
 F:	include/linux/platform_data/shmob_drm.h
 
 DRM DRIVERS FOR ROCKCHIP