ASoC: dt-bindings: Add schema for "awinic,aw87390"

Add a DT schema for describing awinic aw87390 audio amplifiers.
They are controlled using I2C.
Signed-off-by: Weidong Wang <wangweidong.a@awinic.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230928105727.47273-3-wangweidong.a@awinic.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/awinic,aw87390.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/awinic,aw87390.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Awinic Aw87390 Audio Amplifier
+
+maintainers:
+  - Weidong Wang <wangweidong.a@awinic.com>
+
+description:
+  The awinic aw87390 is specifically designed to improve
+  the musical output dynamic range, enhance the overall
+  sound quallity, which is a new high efficiency, low
+  noise, constant large volume, 6th Smart K audio amplifier.
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    const: awinic,aw87390
+
+  reg:
+    maxItems: 1
+
+  "#sound-dai-cells":
+    const: 0
+
+  awinic,audio-channel:
+    description:
+      It is used to distinguish multiple PA devices, so that different
+      configurations can be loaded to different PA devices
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 7
+
+required:
+  - compatible
+  - reg
+  - "#sound-dai-cells"
+  - awinic,audio-channel
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        audio-codec@58 {
+            compatible = "awinic,aw87390";
+            reg = <0x58>;
+            #sound-dai-cells = <0>;
+            awinic,audio-channel = <0>;
+        };
+    };