ASoC: dt-bindings: audio-graph-port: use definitions for port/endpoint

Audio Graph base driver might need to add its own properties.
In such case, having definitions for port/endpoint is easy to handle it.
This patch adds definitions for port/endpoint.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87r0vl7rj4.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/audio-graph-port.yaml

@@ -11,10 +11,10 @@ maintainers:
 
 select: false
 
-allOf:
-  - $ref: /schemas/graph.yaml#/$defs/port-base
-
-properties:
+definitions:
+  port-base:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    properties:
       prefix:
         description: "device name prefix"
         $ref: /schemas/types.yaml#/definitions/string
@@ -25,11 +25,8 @@ properties:
       convert-sample-format:
         $ref: "/schemas/sound/dai-params.yaml#/$defs/dai-sample-format"
 
-patternProperties:
-  "^endpoint(@[0-9a-f]+)?":
+  endpoint-base:
     $ref: /schemas/graph.yaml#/$defs/endpoint-base
-    unevaluatedProperties: false
-
     properties:
       mclk-fs:
         description: |
@@ -100,4 +97,12 @@ patternProperties:
               minimum: 1
               maximum: 64
 
+allOf:
+  - $ref: "#/definitions/port-base"
+
+patternProperties:
+  "^endpoint(@[0-9a-f]+)?":
+    $ref: "#/definitions/endpoint-base"
+    unevaluatedProperties: false
+
 additionalProperties: true