ASoC: dt-bindings: nau8540: Convert to dtschema

Convert the NAU8540 audio CODEC bindings to DT schema

Signed-off-by: Anup Sharma <anupnewsmail@gmail.com

Changes:
V1 -> V2: Adhere to the correct procedure by including the maintainer's name.
          Drop Mark from maintainer.

Link: https://lore.kernel.org/r/ZFYxWVdE9YkMKvXv@yoga
Signed-off-by: Mark Brown <broonie@kernel.org

Documentation/devicetree/bindings/sound/nau8540.txt

-NAU85L40 audio CODEC
-
-This device supports I2C only.
-
-Required properties:
-
-  - compatible : "nuvoton,nau8540"
-
-  - reg : the I2C address of the device.
-
-Example:
-
-codec: nau8540@1c {
-       compatible = "nuvoton,nau8540";
-       reg = <0x1c>;
-};

Documentation/devicetree/bindings/sound/nuvoton,nau8540.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/nuvoton,nau8540.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton Technology Corporation NAU85L40 Audio CODEC
+
+maintainers:
+  - John Hsu <KCHSU0@nuvoton.com>
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    const: nuvoton,nau8540
+
+  reg:
+    maxItems: 1
+
+  "#sound-dai-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        codec@1c {
+            compatible = "nuvoton,nau8540";
+            reg = <0x1c>;
+        };
+    };