arm64: dts: imx8mp: Add src node

Add src node to support i.MX8MP reset controller.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mp.dtsi

@@ -306,6 +306,12 @@ clk: clock-controller@30380000 {
 						       <393216000>,
 						       <361267200>;
 			};
+
+			src: reset-controller@30390000 {
+				compatible = "fsl,imx8mp-src", "syscon";
+				reg = <0x30390000 0x10000>;
+				#reset-cells = <1>;
+			};
 		};
 
 		aips2: bus@30400000 {