media: dt-bindings: media: renesas,fdp1: Add resets property

The resets property is used in DT sources in the kernel tree. Document
it and make it mandatory.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Documentation/devicetree/bindings/media/renesas,fdp1.yaml

@@ -32,6 +32,9 @@ properties:
   power-domains:
     maxItems: 1
 
+  resets:
+    maxItems: 1
+
   renesas,fcp:
     $ref: /schemas/types.yaml#/definitions/phandle
     description:
@@ -44,6 +47,7 @@ required:
   - interrupts
   - clocks
   - power-domains
+  - resets
 
 additionalProperties: false
 
@@ -59,6 +63,7 @@ examples:
         interrupts = <GIC_SPI 262 IRQ_TYPE_LEVEL_HIGH>;
         clocks = <&cpg CPG_MOD 119>;
         power-domains = <&sysc R8A7795_PD_A3VP>;
+        resets = <&cpg 119>;
         renesas,fcp = <&fcpf0>;
     };
 ...