arm64: dts: qcom: sm8450: Allow both GIC-ITS and internal MSI controller

The devicetree should specify both MSI implementations and the OS/driver
should choose the one based on the platform requirements. Currently, Linux
DWC driver will choose GIC-ITS over the internal MSI controller.

Fixes: a11bbf6adef4 ("arm64: dts: qcom: sm8450: Use GIC-ITS for PCIe0 and PCIe1")
Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230111123004.21048-2-manivannan.sadhasivam@linaro.org

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

@@ -1760,6 +1760,9 @@ pcie0: pci@1c00000 {
 			msi-map = <0x0 &gic_its 0x5981 0x1>,
 				  <0x100 &gic_its 0x5980 0x1>;
 			msi-map-mask = <0xff00>;
+			interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "msi";
+			#interrupt-cells = <1>;
 			interrupt-map-mask = <0 0 0 0x7>;
 			interrupt-map = <0 0 0 1 &intc 0 0 0 149 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
 					<0 0 0 2 &intc 0 0 0 150 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
@@ -1873,6 +1876,9 @@ pcie1: pci@1c08000 {
 			msi-map = <0x0 &gic_its 0x5a01 0x1>,
 				  <0x100 &gic_its 0x5a00 0x1>;
 			msi-map-mask = <0xff00>;
+			interrupts = <GIC_SPI 307 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "msi";
+			#interrupt-cells = <1>;
 			interrupt-map-mask = <0 0 0 0x7>;
 			interrupt-map = <0 0 0 1 &intc 0 0 0 434 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
 					<0 0 0 2 &intc 0 0 0 435 IRQ_TYPE_LEVEL_HIGH>, /* int_b */