media: MAINTAINERS: ao-cec: Update path for yaml bindings

Update the path to the ao-cec bindings after conversion to DT Schemas.
Suggested-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@kernel.org>

MAINTAINERS

@@ -10597,7 +10597,7 @@ W:	http://linux-meson.com/
 S:	Supported
 F:	drivers/media/platform/meson/ao-cec.c
 F:	drivers/media/platform/meson/ao-cec-g12a.c
-F:	Documentation/devicetree/bindings/media/meson-ao-cec.txt
+F:	Documentation/devicetree/bindings/media/amlogic,meson-gx-ao-cec.yaml
 T:	git git://linuxtv.org/media_tree.git
 
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