dt-bindings: arm: rockchip: Add Firefly Station P2

Station P2 is a single board computer by firefly based
on rk3568 soc
Signed-off-by: Furkan Kardame <f.kardame@manjaro.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230620184746.55391-2-f.kardame@manjaro.orgSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/arm/rockchip.yaml

@@ -196,6 +196,11 @@ properties:
           - const: firefly,rk3566-roc-pc
           - const: rockchip,rk3566
 
+      - description: Firefly Station P2
+        items:
+          - const: firefly,rk3568-roc-pc
+          - const: rockchip,rk3568
+
       - description: FriendlyElec NanoPi R2 series boards
         items:
           - enum: