ASoC: dt-bindings: Add schema for "awinic,aw88081"

Add the awinic,aw88081 property to support the aw88081 chip,
which is an I2S/TDM input, high efficiency digital
Smart K audio amplifie.

Signed-off-by: Weidong Wang <wangweidong.a@awinic.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20241024090324.131731-2-wangweidong.a@awinic.com


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