media: dt-bindings: media: rockchip-vdec: add RK3228 compatible

Document the RK3228 compatible for rockchip-vdec.
Also add the optional assigned-clocks and assigned-clock-rates
properties.
Signed-off-by: Alex Bee <knaerzche@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Documentation/devicetree/bindings/media/rockchip,vdec.yaml

@@ -15,7 +15,11 @@ description: |-
 
 properties:
   compatible:
-    const: rockchip,rk3399-vdec
+    oneOf:
+      - const: rockchip,rk3399-vdec
+      - items:
+          - const: rockchip,rk3228-vdec
+          - const: rockchip,rk3399-vdec
 
   reg:
     maxItems: 1
@@ -37,6 +41,10 @@ properties:
       - const: cabac
       - const: core
 
+  assigned-clocks: true
+
+  assigned-clock-rates: true
+
   power-domains:
     maxItems: 1