ASoC: dt-bindings: wm8776: Convert to dtschema

Convert WM8776 audio CODEC bindings from text to dtschema.

Signed-off-by: Kartik Agarwala <agarwala.kartik@gmail.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://msgid.link/r/20240317200201.119233-1-agarwala.kartik@gmail.com


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