ASoC: dt-bindings: fsl,imx-asrc/spdif: Add power-domains property

Add power-domains property for asrc and spdif since fsl,imx8qm-asrc/spdif
and fsl,imx8qxp-asrc/spdif require 'power-domains'.

Set 'power-domains' as required property for compatible string
fsl,imx8qm-asrc/spdif and fsl,imx8qxp-asrc/spdif.
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://msgid.link/r/20240328-asrc_8qxp-v8-1-801cd6bb5be2@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml

@@ -74,6 +74,9 @@ properties:
       - const: asrck_f
       - const: spba
 
+  power-domains:
+    maxItems: 1
+
   fsl,asrc-rate:
     $ref: /schemas/types.yaml#/definitions/uint32
     description: The mutual sample rate used by DPCM Back Ends
@@ -131,6 +134,17 @@ allOf:
       properties:
         fsl,asrc-clk-map: false
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx8qm-asrc
+              - fsl,imx8qxp-asrc
+    then:
+      required:
+        - power-domains
+
 additionalProperties: false
 
 examples:

Documentation/devicetree/bindings/sound/fsl,spdif.yaml

@@ -86,6 +86,9 @@ properties:
       registers. Set this flag for HCDs with big endian descriptors and big
       endian registers.
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -97,6 +100,18 @@ required:
 
 additionalProperties: false
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx8qm-spdif
+              - fsl,imx8qxp-spdif
+    then:
+      required:
+        - power-domains
+
 examples:
   - |
     spdif@2004000 {