dt-bindings: pinctrl: Add rk3576 pinctrl support

Add the compatible string for the rk3576 SoC.

Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/20240822195706.920567-4-detlev.casanova@collabora.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: cazou

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

@@ -45,6 +45,7 @@ properties:
       - rockchip,rk3368-pinctrl
       - rockchip,rk3399-pinctrl
       - rockchip,rk3568-pinctrl
+      - rockchip,rk3576-pinctrl
       - rockchip,rk3588-pinctrl
       - rockchip,rv1108-pinctrl
       - rockchip,rv1126-pinctrl