dt-bindings: display: renesas,du: Add missing constraints

The binding is missing maxItems for all renesas,cmms and renesas,vsps
properties. As the amount of cmms or vsps is always a fixed amount, set
the maxItems to match the minItems.

Also add the minItems and maxItems to the top level properties.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241217-rcar-gh-dsi-v5-3-e77421093c05@ideasonboard.com

Documentation/devicetree/bindings/display/renesas,du.yaml

@@ -77,6 +77,8 @@ properties:
 
   renesas,cmms:
     $ref: /schemas/types.yaml#/definitions/phandle-array
+    minItems: 1
+    maxItems: 4
     items:
       maxItems: 1
     description:
@@ -85,6 +87,8 @@ properties:
 
   renesas,vsps:
     $ref: /schemas/types.yaml#/definitions/phandle-array
+    minItems: 1
+    maxItems: 4
     items:
       items:
         - description: phandle to VSP instance that serves the DU channel
@@ -489,9 +493,11 @@ allOf:
 
         renesas,cmms:
           minItems: 4
+          maxItems: 4
 
         renesas,vsps:
           minItems: 4
+          maxItems: 4
 
       required:
         - clock-names
@@ -558,9 +564,11 @@ allOf:
 
         renesas,cmms:
           minItems: 3
+          maxItems: 3
 
         renesas,vsps:
           minItems: 3
+          maxItems: 3
 
       required:
         - clock-names
@@ -627,9 +635,11 @@ allOf:
 
         renesas,cmms:
           minItems: 3
+          maxItems: 3
 
         renesas,vsps:
           minItems: 3
+          maxItems: 3
 
       required:
         - clock-names
@@ -683,7 +693,7 @@ allOf:
             - port@1
 
         renesas,vsps:
-          minItems: 1
+          maxItems: 1
 
       required:
         - clock-names
@@ -746,9 +756,11 @@ allOf:
 
         renesas,cmms:
           minItems: 2
+          maxItems: 2
 
         renesas,vsps:
           minItems: 2
+          maxItems: 2
 
       required:
         - clock-names
@@ -799,6 +811,7 @@ allOf:
 
         renesas,vsps:
           minItems: 2
+          maxItems: 2
 
       required:
         - clock-names