arm64: dts: ls1043a: Add SCFG phandle for PCIe nodes

The LS1043A PCIe controller has some control registers
in SCFG block, so add the SCFG phandle for each PCIe
controller DT node.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi

@@ -874,6 +874,7 @@
 			interrupts = <0 118 0x4>, /* controller interrupt */
 				     <0 117 0x4>; /* PME interrupt */
 			interrupt-names = "intr", "pme";
+			fsl,pcie-scfg = <&scfg 0>;
 			#address-cells = <3>;
 			#size-cells = <2>;
 			device_type = "pci";
@@ -901,6 +902,7 @@
 			interrupts = <0 128 0x4>,
 				     <0 127 0x4>;
 			interrupt-names = "intr", "pme";
+			fsl,pcie-scfg = <&scfg 1>;
 			#address-cells = <3>;
 			#size-cells = <2>;
 			device_type = "pci";
@@ -928,6 +930,7 @@
 			interrupts = <0 162 0x4>,
 				     <0 161 0x4>;
 			interrupt-names = "intr", "pme";
+			fsl,pcie-scfg = <&scfg 2>;
 			#address-cells = <3>;
 			#size-cells = <2>;
 			device_type = "pci";