dt-bindings: media: renesas,vin: Make resets optional on R-Car Gen1

The "resets" property is not present on R-Car Gen1 SoCs.
Supporting it would require migrating from renesas,cpg-clocks to
renesas,cpg-mssr.

Fixes: 905fc6b1bf ("dt-bindings: rcar-vin: Convert bindings to json-schema")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/217c8197efaee7d803b22d433abb0ea8e33b84c6.1619700314.git.geert+renesas@glider.be
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/media/renesas,vin.yaml

@@ -193,23 +193,35 @@ required:
   - interrupts
   - clocks
   - power-domains
-  - resets
 
-if:
+allOf:
-  properties:
+  - if:
-    compatible:
+      not:
-      contains:
+        properties:
-        enum:
+          compatible:
-          - renesas,vin-r8a7778
+            contains:
-          - renesas,vin-r8a7779
+              enum:
-          - renesas,rcar-gen2-vin
+                - renesas,vin-r8a7778
-then:
+                - renesas,vin-r8a7779
-  required:
+    then:
-    - port
+      required:
-else:
+        - resets
-  required:
+
-    - renesas,id
+  - if:
-    - ports
+      properties:
+        compatible:
+          contains:
+            enum:
+              - renesas,vin-r8a7778
+              - renesas,vin-r8a7779
+              - renesas,rcar-gen2-vin
+    then:
+      required:
+        - port
+    else:
+      required:
+        - renesas,id
+        - ports
 
 additionalProperties: false