ASoC: dt-bindings: adi,adau7002: Convert to DT schema

ASoC: dt-bindings: adi,adau7002: Convert to DT schema

Convert the Analog Devices ADAU7002 Stereo PDM-to-I2S/TDM Converter
bindings to DT schema.  During the conversion, add properties already
used by DTS (sc7180-trogdor-coachz.dts) and Linux driver:
1. wakeup-delay-ms,
2. sound-dai-cells (via referencing dai-common.yaml).

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221209175947.335319-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>