arm64: dts: ls1088a: add gicv3 ITS DT node

Add ITS device tree node, which will be used by PCIe controller.
Signed-off-by: NHou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi

@@ -147,6 +147,15 @@
 		      <0x0 0x0c0d0000 0 0x1000>, /* GICH */
 		      <0x0 0x0c0e0000 0 0x20000>; /* GICV */
 		interrupts = <1 9 IRQ_TYPE_LEVEL_HIGH>;
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		its: gic-its@6020000 {
+			compatible = "arm,gic-v3-its";
+			msi-controller;
+			reg = <0x0 0x6020000 0 0x20000>;
+		};
 	};
 
 	timer {