ASoC: dt-bindings: mediatek,mt8188-mt6359: add NAU8825 support

Add compatible string "mediatek,mt8188-nau8825" to support new board
with nau8825 codec.

Introduce two properties "dai-format" and "mediatek,clk-provider" under
dai-link subnode to configure dai-link parameters via dts.

"codec" property is removed from required property of dai-link subnode.
For co-clock case, it's possible two dai-links should be configured to
the same dai format, but only one cpu dai is bound with codec.

Signed-off-by: Trevor Wu <trevor.wu@mediatek.com>
Link: https://lore.kernel.org/r/20230526093150.22923-8-trevor.wu@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/mediatek,mt8188-mt6359.yaml

@@ -11,7 +11,9 @@ maintainers:
 
 properties:
   compatible:
-    const: mediatek,mt8188-mt6359-evb
+    enum:
+      - mediatek,mt8188-mt6359-evb
+      - mediatek,mt8188-nau8825
 
   model:
     $ref: /schemas/types.yaml#/definitions/string
@@ -61,11 +63,28 @@ patternProperties:
         required:
           - sound-dai
 
+      dai-format:
+        description: audio format.
+        items:
+          enum:
+            - i2s
+            - right_j
+            - left_j
+            - dsp_a
+            - dsp_b
+
+      mediatek,clk-provider:
+        $ref: /schemas/types.yaml#/definitions/string
+        description: Indicates dai-link clock master.
+        items:
+          enum:
+            - cpu
+            - codec
+
     additionalProperties: false
 
     required:
       - link-name
-      - codec
 
 additionalProperties: false
 
@@ -86,7 +105,8 @@ examples:
             "AIN1", "Headset Mic";
         dai-link-0 {
             link-name = "ETDM3_OUT_BE";
-
+            dai-format = "i2s";
+            mediatek,clk-provider = "cpu";
             codec {
                 sound-dai = <&hdmi0>;
             };