dt-bindings: power: rockchip: Add bindings for rk3588

Add the compatible string for RK3588 SoC.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20220906143825.199089-4-sebastian.reichel@collabora.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/power/rockchip,power-controller.yaml

@@ -41,6 +41,7 @@ properties:
       - rockchip,rk3368-power-controller
       - rockchip,rk3399-power-controller
       - rockchip,rk3568-power-controller
+      - rockchip,rk3588-power-controller
       - rockchip,rv1126-power-controller
 
   "#power-domain-cells":
@@ -120,6 +121,7 @@ $defs:
           "include/dt-bindings/power/rk3368-power.h"
           "include/dt-bindings/power/rk3399-power.h"
           "include/dt-bindings/power/rk3568-power.h"
+          "include/dt-bindings/power/rk3588-power.h"
           "include/dt-bindings/power/rockchip,rv1126-power.h"
 
       clocks: