dt-bindings: display/msm/dsi-controller-main: allow defining opp-table

Allow defining DSI OPP table inside the DSI controller node.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml

@@ -80,6 +80,9 @@ properties:
 
   operating-points-v2: true
 
+  opp-table:
+    type: object
+
   ports:
     $ref: "/schemas/graph.yaml#/properties/ports"
     description: |