media: MAINTAINERS: Add ADV7604 bindings documentation

Add the YAML dt-bindings document for ADV7604.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

MAINTAINERS

@@ -1073,6 +1073,7 @@ M:	Hans Verkuil <hverkuil-cisco@xs4all.nl>
 L:	linux-media@vger.kernel.org
 S:	Maintained
 F:	drivers/media/i2c/adv7604*
+F:	Documentation/devicetree/bindings/media/i2c/adv7604.yaml
 
 ANALOG DEVICES INC ADV7842 DRIVER
 M:	Hans Verkuil <hverkuil-cisco@xs4all.nl>