arm64: dts: allwinner: h6: Add IOMMU

Now that we have a driver for the IOMMU, let's start using it.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>

arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi

@@ -135,6 +135,7 @@ mixer0: mixer@100000 {
 				clock-names = "bus",
 					      "mod";
 				resets = <&display_clocks RST_MIXER0>;
+				iommus = <&iommu 0>;
 
 				ports {
 					#address-cells = <1>;
@@ -413,6 +414,15 @@ gic: interrupt-controller@3021000 {
 			#interrupt-cells = <3>;
 		};
 
+		iommu: iommu@30f0000 {
+			compatible = "allwinner,sun50i-h6-iommu";
+			reg = <0x030f0000 0x10000>;
+			interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_IOMMU>;
+			resets = <&ccu RST_BUS_IOMMU>;
+			#iommu-cells = <1>;
+		};
+
 		mmc0: mmc@4020000 {
 			compatible = "allwinner,sun50i-h6-mmc",
 				     "allwinner,sun50i-a64-mmc";