media: dt-bindings: renesas,rzg2l-cru: Document Renesas RZ/G2UL CRU block

Document the CRU IP found in Renesas RZ/G2UL SoC.

The CRU block on the RZ/G2UL SoC is identical to one found on the
RZ/G2L SoC, but it does not support parallel input.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240605154115.263447-3-biju.das.jz@bp.renesas.comSigned-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/media/renesas,rzg2l-cru.yaml

@@ -19,6 +19,7 @@ properties:
   compatible:
     items:
       - enum:
+          - renesas,r9a07g043-cru       # RZ/G2UL
           - renesas,r9a07g044-cru       # RZ/G2{L,LC}
           - renesas,r9a07g054-cru       # RZ/V2L
       - const: renesas,rzg2l-cru
@@ -87,10 +88,6 @@ properties:
           Input port node, describing the Image Processing module connected to the
           CSI-2 receiver.
 
-    required:
-      - port@0
-      - port@1
-
 required:
   - compatible
   - reg
@@ -102,6 +99,36 @@ required:
   - reset-names
   - power-domains
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - renesas,r9a07g044-cru
+              - renesas,r9a07g054-cru
+    then:
+      properties:
+        ports:
+          required:
+            - port@0
+            - port@1
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - renesas,r9a07g043-cru
+    then:
+      properties:
+        ports:
+          properties:
+            port@0: false
+
+          required:
+            - port@1
+
 additionalProperties: false
 
 examples: