ASoC: dt-bindings: ak4554: Convert to dtschema

Convert the AK4554 sound codec bindings to DT schema.
Signed-off-by: Animesh Agarwal <animeshagarwal28@gmail.com>
Cc: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20240607055725.38057-1-animeshagarwal28@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/ak4554.txt

-AK4554 ADC/DAC
-
-Required properties:
-
-  - compatible : "asahi-kasei,ak4554"
-
-Example:
-
-ak4554-adc-dac {
-	compatible = "asahi-kasei,ak4554";
-};

Documentation/devicetree/bindings/sound/asahi-kasei,ak4554.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/asahi-kasei,ak4554.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AK4554 sound codec
+
+maintainers:
+  - Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+  - Liam Girdwood <lgirdwood@gmail.com>
+  - Mark Brown <broonie@kernel.org>
+
+properties:
+  compatible:
+    const: asahi-kasei,ak4554
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    codec {
+        compatible = "asahi-kasei,ak4554";
+    };