arm64: dts: qcom: sm8450 add ITS device tree node

Add device tree node corresponding to the ITS part of GICv3.
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220502192604.272686-1-dmitry.baryshkov@linaro.org

arch/arm64/boot/dts/qcom/sm8450.dtsi

@@ -2853,6 +2853,16 @@ intc: interrupt-controller@17100000 {
 			reg = <0x0 0x17100000 0x0 0x10000>,     /* GICD */
 			      <0x0 0x17180000 0x0 0x200000>;    /* GICR * 8 */
 			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
+			#address-cells = <2>;
+			#size-cells = <2>;
+			ranges;
+
+			gic_its: msi-controller@17140000 {
+				compatible = "arm,gic-v3-its";
+				reg = <0x0 0x17140000 0x0 0x20000>;
+				msi-controller;
+				#msi-cells = <1>;
+			};
 		};
 
 		timer@17420000 {