ASoC: dt-bindings: Add schema for "awinic,aw88399"

Add the awinic,aw88399 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/20231025112625.959587-2-wangweidong.a@awinic.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/awinic,aw88395.yaml

@@ -19,6 +19,7 @@ properties:
     enum:
       - awinic,aw88395
       - awinic,aw88261
+      - awinic,aw88399
 
   reg:
     maxItems: 1