ASoC: dt-bindings: Add tas2781 amplifier

Create tas2781.yaml for tas2781 driver.

Signed-off-by: Shenghao Ding <13916275206@139.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230618122819.23143-4-13916275206@139.com


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