media: MAINTAINERS: add myself to co-maintain Hantro G1/G2 for i.MX8MQ

Add path and co-maintainer entry for i.MX8MQ device tree bindings.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

MAINTAINERS

@@ -14314,10 +14314,12 @@ F:	Documentation/devicetree/bindings/media/rockchip-rga.txt
 
 HANTRO VPU CODEC DRIVER
 M:	Ezequiel Garcia <ezequiel@collabora.com>
+M:	Philipp Zabel <p.zabel@pengutronix.de>
 L:	linux-media@vger.kernel.org
 L:	linux-rockchip@lists.infradead.org
 S:	Maintained
 F:	drivers/staging/media/hantro/
+F:	Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml
 F:	Documentation/devicetree/bindings/media/rockchip-vpu.txt
 
 ROCKER DRIVER