dt-bindings: arm: rockchip: Add EmbedFire LubanCat 2

Add EmbedFire LubanCat 2
Signed-off-by: Andy Yan <andyshrk@163.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230108110742.2214800-1-andyshrk@163.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/arm/rockchip.yaml

@@ -100,6 +100,11 @@ properties:
           - const: embedfire,lubancat-1
           - const: rockchip,rk3566
 
+      - description: EmbedFire LubanCat 2
+        items:
+          - const: embedfire,lubancat-2
+          - const: rockchip,rk3568
+
       - description: Engicam PX30.Core C.TOUCH 2.0
         items:
           - const: engicam,px30-core-ctouch2