media: dt-bindings: media: renesas,fcp: Add resets and iommus properties

The resets and iommus properties are used in DT sources in the kernel
tree. Document them, and make resets mandatory. The iommus property is
optional as not all platforms wire the FCP to a functional IOMMU.
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,fcp.yaml

@@ -31,14 +31,21 @@ properties:
   clocks:
     maxItems: 1
 
+  iommus:
+    maxItems: 1
+
   power-domains:
     maxItems: 1
 
+  resets:
+    maxItems: 1
+
 required:
   - compatible
   - reg
   - clocks
   - power-domains
+  - resets
 
 additionalProperties: false
 
@@ -53,5 +60,7 @@ examples:
         reg = <0xfea2f000 0x200>;
         clocks = <&cpg CPG_MOD 602>;
         power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
+        resets = <&cpg 602>;
+        iommus = <&ipmmu_vi0 9>;
     };
 ...