ASoC: dt-bindings: Convert MT8173 AFE binding to dt-schema

ASoC: dt-bindings: Convert MT8173 AFE binding to dt-schema

Convert the MT8173 AFE (audio frontend) binding from text to dt-schema
in YAML. "clocks" is added to the list of required properties to match
"clock-names". And the example was slightly fixed up in style. Otherwise
everything is as before.

A contributer and maintainer for a recently added MediaTek audio binding
was chosen instead of the original submitter.

Cc: Trevor Wu <trevor.wu@mediatek.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://patch.msgid.link/20250612074901.4023253-2-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>