ASoC: dt-bindings: Refine 'frame-master' and 'bitclock-master' type

'frame-master' and 'bitclock-master' are only a single phandle, so use
the more specific 'phandle' type definition instead.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Sameer Pujar <spujar@nvidia.com>
Link: https://lore.kernel.org/r/20201117013349.2458416-5-robh@kernel.orgSigned-off-by: Mark Brown <broonie@kernel.org>

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

@@ -47,12 +47,10 @@ properties:
             $ref: /schemas/types.yaml#/definitions/flag
           frame-master:
             description: Indicates dai-link frame master.
-            $ref: /schemas/types.yaml#/definitions/phandle-array
-            maxItems: 1
+            $ref: /schemas/types.yaml#/definitions/phandle
           bitclock-master:
             description: Indicates dai-link bit clock master
-            $ref: /schemas/types.yaml#/definitions/phandle-array
-            maxItems: 1
+            $ref: /schemas/types.yaml#/definitions/phandle
           dai-format:
             description: audio format.
             items:

Documentation/devicetree/bindings/sound/simple-card.yaml

@@ -13,13 +13,11 @@ definitions:
 
   frame-master:
     description: Indicates dai-link frame master.
-    $ref: /schemas/types.yaml#/definitions/phandle-array
-    maxItems: 1
+    $ref: /schemas/types.yaml#/definitions/phandle
 
   bitclock-master:
     description: Indicates dai-link bit clock master
-    $ref: /schemas/types.yaml#/definitions/phandle-array
-    maxItems: 1
+    $ref: /schemas/types.yaml#/definitions/phandle
 
   frame-inversion:
     description: dai-link uses frame clock inversion