dt-bindings: pinctrl: Add rk3562 pinctrl support

Add the compatible string for the rk3562 SoC.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/20241224093522.3815562-1-kever.yang@rock-chips.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: keveryang

Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.yaml

@@ -44,6 +44,7 @@ properties:
       - rockchip,rk3328-pinctrl
       - rockchip,rk3368-pinctrl
       - rockchip,rk3399-pinctrl
+      - rockchip,rk3562-pinctrl
       - rockchip,rk3568-pinctrl
       - rockchip,rk3576-pinctrl
       - rockchip,rk3588-pinctrl