ASoC: dt-bindings: Add schema for "awinic,aw88261"

Add the awinic,aw88261 property to the awinic,aw88395.yaml file.

Signed-off-by: Weidong Wang <wangweidong.a@awinic.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230804114749.215460-2-wangweidong.a@awinic.com


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