dt-bindings: display: renesas,rzg2l-du: Add support for RZ/V2H(P) SoC

The DU block on the RZ/V2H(P) SoC is identical to the one found on the
RZ/G2L SoC. However, it only supports the DSI interface, whereas the
RZ/G2L supports both DSI and DPI interfaces.

Due to this difference, a SoC-specific compatible string
'renesas,r9a09g057-du' is added for the RZ/V2H(P) SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20250512182330.238259-2-prabhakar.mahadev-lad.rj@bp.renesas.com

Documentation/devicetree/bindings/display/renesas,rzg2l-du.yaml

@@ -20,6 +20,7 @@ properties:
       - enum:
           - renesas,r9a07g043u-du # RZ/G2UL
           - renesas,r9a07g044-du # RZ/G2{L,LC}
+          - renesas,r9a09g057-du # RZ/V2H(P)
       - items:
           - enum:
               - renesas,r9a07g054-du    # RZ/V2L
@@ -101,7 +102,12 @@ allOf:
 
           required:
             - port@0
-    else:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a07g044-du
+    then:
       properties:
         ports:
           properties:
@@ -113,6 +119,21 @@ allOf:
           required:
             - port@0
             - port@1
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a09g057-du
+    then:
+      properties:
+        ports:
+          properties:
+            port@0:
+              description: DSI
+            port@1: false
+
+          required:
+            - port@0
 
 examples:
   # RZ/G2L DU