dt-bindings: pinctrl: rockchip: Document RV1126 pinctrl

Document dt-bindings for RV1126 SoC pinctrl support.

Cc: linux-gpio@vger.kernel.org
Cc: Linus Walleij <linus.walleij@linaro.org>
Acked-by: NKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: NJagan Teki <jagan@edgeble.ai>
Link: https://lore.kernel.org/r/20220818124132.125304-7-jagan@edgeble.aiSigned-off-by: NLinus Walleij <linus.walleij@linaro.org>

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

@@ -47,6 +47,7 @@ properties:
       - rockchip,rk3568-pinctrl
       - rockchip,rk3588-pinctrl
       - rockchip,rv1108-pinctrl
+      - rockchip,rv1126-pinctrl
 
   rockchip,grf:
     $ref: "/schemas/types.yaml#/definitions/phandle"