ASoC: dt-bindings: wm8753: Convert to dtschema

Convert the WM8753 audio codec bindings to DT schema.

Signed-off-by: Saalim Quadri <danascape@gmail.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230414223801.1106550-1-danascape@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>