dt-bindings: display: msm: sm8650-mdss: Add missing explicit "additionalProperties"

In order to check schemas for missing additionalProperties or
unevaluatedProperties, cases allowing extra properties must be explicit.

Signed-off-by: Rob Herring <[e-mail]>
Reviewed-by: Dmitry Baryshkov <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Patchwork: https://patchwork.freedesktop.org/patch/576954/
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Baryshkov <[e-mail]>

Documentation/devicetree/bindings/display/msm/qcom,sm8650-mdss.yaml

···
 patternProperties:
   "^display-controller@[0-9a-f]+$":
     type: object
+    additionalProperties: true
     properties:
       compatible:
         const: qcom,sm8650-dpu
 
   "^displayport-controller@[0-9a-f]+$":
     type: object
+    additionalProperties: true
     properties:
       compatible:
         const: qcom,sm8650-dp
 
   "^dsi@[0-9a-f]+$":
     type: object
+    additionalProperties: true
     properties:
       compatible:
         items:
···
 
   "^phy@[0-9a-f]+$":
     type: object
+    additionalProperties: true
     properties:
       compatible:
         const: qcom,sm8650-dsi-phy-4nm