ASoC: dt-bindings: ep93xx: Document Audio Port support

Document Audio Graph Port support in binding document.

Signed-off-by: Nikita Shubin <[email protected]>
Tested-by: Alexander Sverdlin <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Acked-by: Miquel Raynal <[email protected]>
Acked-by: Vinod Koul <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

Author: maquefel

Documentation/devicetree/bindings/sound/cirrus,ep9301-i2s.yaml

@@ -50,6 +50,10 @@ properties:
       - const: tx
       - const: rx
 
+  port:
+    $ref: audio-graph-port.yaml#
+    unevaluatedProperties: false
+
 required:
   - compatible
   - '#sound-dai-cells'