arm64: dts: mediatek: mt8167: add iommu node

Add node for the MT8167's IOMMU.
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Link: https://lore.kernel.org/r/20210406113631.2675029-2-fparent@baylibre.comSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt8167.dtsi

@@ -170,5 +170,13 @@ larb2: larb@16010000 {
 			clock-names = "apb", "smi";
 			power-domains = <&spm MT8167_POWER_DOMAIN_VDEC>;
 		};
+
+		iommu: m4u@10203000 {
+			compatible = "mediatek,mt8167-m4u";
+			reg = <0 0x10203000 0 0x1000>;
+			mediatek,larbs = <&larb0 &larb1 &larb2>;
+			interrupts = <GIC_SPI 121 IRQ_TYPE_LEVEL_LOW>;
+			#iommu-cells = <1>;
+		};
 	};
 };