ARM64: zynqmp: Extend pcie node to support legacy interrupts

Modifying device tree node to support legacy interrupts.

Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com>
Signed-off-by: Ravi Kiran Gummaluri <rgummal@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/dts/zynqmp.dtsi

@@ -629,6 +629,16 @@
 			      <0x0 0xe0000000 0x1000000>;
 			reg-names = "breg", "pcireg", "cfg";
 			ranges = <0x02000000 0x00000000 0xe1000000 0x00000000 0xe1000000 0 0x0f000000>;
+			interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+			interrupt-map = <0x0 0x0 0x0 0x1 &pcie_intc 0x1>,
+					<0x0 0x0 0x0 0x2 &pcie_intc 0x2>,
+					<0x0 0x0 0x0 0x3 &pcie_intc 0x3>,
+					<0x0 0x0 0x0 0x4 &pcie_intc 0x4>;
+			pcie_intc: legacy-interrupt-controller {
+				interrupt-controller;
+				#address-cells = <0>;
+				#interrupt-cells = <1>;
+			};
 		};
 
 		qspi: spi@ff0f0000 {