ASoC: dt-bindings: max98388: add amplifier driver

Add dt-bindings information for Analog Devices MAX98388 I2S Amplifier

Signed-off-by: Ryan Lee <ryans.lee@analog.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230613060945.183128-1-ryan.lee.analog@gmail.com


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