dt-bindings: sound: google,goldfish-audio: Convert to DT schema

Convert the Android Goldfish Audio binding to DT schema format.
Move the file to the sound directory to match the subsystem.
Update the example node name to 'sound' to comply with generic node
naming standards.

Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260113092602.3197681-6-visitorckw@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/goldfish/audio.txt

@@ -1,17 +0,0 @@
-Android Goldfish Audio
-
-Android goldfish audio device generated by android emulator.
-
-Required properties:
-
-- compatible : should contain "google,goldfish-audio" to match emulator
-- reg        : <registers mapping>
-- interrupts : <interrupt mapping>
-
-Example:
-
-	goldfish_audio@9030000 {
-		compatible = "google,goldfish-audio";
-		reg = <0x9030000 0x100>;
-		interrupts = <0x4>;
-	};

Documentation/devicetree/bindings/sound/google,goldfish-audio.yaml

@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/google,goldfish-audio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Android Goldfish Audio
+
+maintainers:
+  - Kuan-Wei Chiu <visitorckw@gmail.com>
+
+description:
+  Android goldfish audio device generated by Android emulator.
+
+properties:
+  compatible:
+    const: google,goldfish-audio
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    sound@9030000 {
+        compatible = "google,goldfish-audio";
+        reg = <0x9030000 0x100>;
+        interrupts = <4>;
+    };