ASoC: dt-bindings: mt8183-da7219: add a property "mediatek, hdmi-codec"

Adds an optional property "mediatek,hdmi-codec".

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200710052505.3664118-5-tzungbi@google.com


Signed-off-by: Mark Brown <broonie@kernel.org>