ASoC: dt-bindings: audio-graph-port: Drop type from "clocks"

"clocks" is a standard property which already has a type. Users only need
to define how many clocks and what each clock is if more than 1 clock.

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://msgid.link/r/20240124190808.1555263-1-robh@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

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

@@ -51,7 +51,7 @@ definitions:
           - $ref: /schemas/types.yaml#/definitions/phandle
       clocks:
         description: Indicates system clock
-        $ref: /schemas/types.yaml#/definitions/phandle
+        maxItems: 1
       system-clock-frequency:
         $ref: simple-card.yaml#/definitions/system-clock-frequency
       system-clock-direction-out: