arm64: dts: freescale: imx8dxl: add scu_gpio node

add scu_gpio node in system-controller.
Signed-off-by: Shenwei Wang <shenwei.wang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8dxl.dtsi

@@ -133,6 +133,12 @@ clk: clock-controller {
 			clock-names = "xtal_32KHz", "xtal_24Mhz";
 		};
 
+		scu_gpio: gpio {
+			compatible = "fsl,imx8qxp-sc-gpio";
+			gpio-controller;
+			#gpio-cells = <2>;
+		};
+
 		iomuxc: pinctrl {
 			compatible = "fsl,imx8dxl-iomuxc";
 		};