MAINTAINERS: Add missing bindings for max96712

Add the binding documentation to the entry in the MAINTAINERS file.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

MAINTAINERS

@@ -13020,6 +13020,7 @@ MAX96712 QUAD GMSL2 DESERIALIZER DRIVER
 M:	Niklas Söderlund <niklas.soderlund@ragnatech.se>
 L:	linux-media@vger.kernel.org
 S:	Maintained
+F:	Documentation/devicetree/bindings/media/i2c/maxim,max96712.yaml
 F:	drivers/staging/media/max96712/max96712.c
 
 MAX9860 MONO AUDIO VOICE CODEC DRIVER