media: dt-bindings: media: mediatek: vcodec: add decoder dt-bindings for mt8188

Add decoder document in dt-bindings yaml file for mt8188 platform.
Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml

@@ -57,6 +57,7 @@ properties:
     enum:
       - mediatek,mt8192-vcodec-dec
       - mediatek,mt8186-vcodec-dec
+      - mediatek,mt8188-vcodec-dec
       - mediatek,mt8195-vcodec-dec
 
   reg: