MAINTAINERS: Add entry for Samsung MFC DT Schema

Add device tree schema entry for Samsung MFC.

Signed-off-by: Aakarsh Jain <aakarsh.jain@samsung.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

MAINTAINERS

@@ -2752,6 +2752,7 @@ M:	Andrzej Hajda <andrzej.hajda@intel.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 L:	linux-media@vger.kernel.org
 S:	Maintained
+F:	Documentation/devicetree/bindings/media/samsung,s5p-mfc.yaml
 F:	drivers/media/platform/samsung/s5p-mfc/
 ARM/SOCFPGA ARCHITECTURE