ASoC: dt-bindings: nau8315: Convert to dtschema

Convert the NAU8315 audio CODEC bindings to DT schema.

Signed-off-by: David Lin <CTLIN0@nuvoton.com
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org
Link: https://lore.kernel.org/r/20230516054944.1081808-1-CTLIN0@nuvoton.com
Signed-off-by: Mark Brown <broonie@kernel.org

Documentation/devicetree/bindings/sound/nau8315.txt

-Nuvoton NAU8315 Mono Class-D Amplifier
-
-Required properties:
-- compatible   : "nuvoton,nau8315"
-                 "nuvoton,nau8318"
-
-Optional properties:
-- enable-gpios : GPIO specifier for the chip's device enable input(EN) pin.
-        If this option is not specified then driver does not manage
-        the pin state (e.g. chip is always on).
-
-Example:
-
-#include <dt-bindings/gpio/gpio.h>
-
-nau8315 {
-	compatible = "nuvoton,nau8315";
-	enable-gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>;
-};
-
-nau8318 {
-	compatible = "nuvoton,nau8318";
-	enable-gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>;
-};

Documentation/devicetree/bindings/sound/nuvoton,nau8315.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/nuvoton,nau8315.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NAU8315/NAU8318 Mono Class-D Amplifier
+
+maintainers:
+  - David Lin <CTLIN0@nuvoton.com>
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - nuvoton,nau8315
+      - nuvoton,nau8318
+
+  '#sound-dai-cells':
+    const: 0
+
+  enable-gpios:
+    maxItems: 1
+    description:
+      GPIO specifier for the chip's device enable input(EN) pin.
+      If this option is not specified then driver does not manage
+      the pin state (e.g. chip is always on).
+
+required:
+  - compatible
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    codec {
+        compatible = "nuvoton,nau8315";
+        #sound-dai-cells = <0>;
+        enable-gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>;
+    };