dt-bindings: display/msm: Reference DAI schema for DAI properties

DisplayPort nodes are DAIs (Digital Audio Interfaces): they have already
'sound-dai-cells'.  Reference the common DAI schema to bring common
properties for them, which allows also customizing DAI name prefix.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Patchwork: https://patchwork.freedesktop.org/patch/682376/
Link: https://lore.kernel.org/r/20251021111050.28554-3-krzysztof.kozlowski@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

Documentation/devicetree/bindings/display/msm/dp-controller.yaml

@@ -198,6 +198,7 @@ allOf:
                 - qcom,sa8775p-dp
                 - qcom,x1e80100-dp
       then:
+        $ref: /schemas/sound/dai-common.yaml#
         oneOf:
           - required:
               - aux-bus
@@ -295,7 +296,7 @@ allOf:
           minItems: 6
           maxItems: 8
 
-additionalProperties: false
+unevaluatedProperties: false
 
 examples:
   - |