dt-bindings: arm: rockchip: Add Anbernic RG-Arc

Add the Anbernic RG-Arc S and RG-Arc D devices, and consolidate
all Anbernic RK3566 based devices under a single description.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240123212111.202146-3-macroalpha82@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/arm/rockchip.yaml

@@ -37,29 +37,16 @@ properties:
               - anbernic,rg351v
           - const: rockchip,rk3326
 
-      - description: Anbernic RG353P
+      - description: Anbernic RK3566 Handheld Gaming Console
         items:
-          - const: anbernic,rg353p
-          - const: rockchip,rk3566
-
-      - description: Anbernic RG353PS
-        items:
-          - const: anbernic,rg353ps
-          - const: rockchip,rk3566
-
-      - description: Anbernic RG353V
-        items:
-          - const: anbernic,rg353v
-          - const: rockchip,rk3566
-
-      - description: Anbernic RG353VS
-        items:
-          - const: anbernic,rg353vs
-          - const: rockchip,rk3566
-
-      - description: Anbernic RG503
-        items:
-          - const: anbernic,rg503
+          - enum:
+              - anbernic,rg353p
+              - anbernic,rg353ps
+              - anbernic,rg353v
+              - anbernic,rg353vs
+              - anbernic,rg503
+              - anbernic,rg-arc-d
+              - anbernic,rg-arc-s
           - const: rockchip,rk3566
 
       - description: Asus Tinker board