arm64: dts: marvell: ap80x: fix IOMMU unit address

Correct the IOMMU device node unit address to match "reg" and fix dtc
W=1 warnings:

  armada-ap80x.dtsi:64.24-80.6: Warning (simple_bus_reg): /ap807/config-space@f0000000/iommu@5000000: simple-bus unit address format error, expected "100000"
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

arch/arm64/boot/dts/marvell/armada-ap80x.dtsi

@@ -61,7 +61,7 @@ config-space@f0000000 {
 			compatible = "simple-bus";
 			ranges = <0x0 0x0 0xf0000000 0x1000000>;
 
-			smmu: iommu@5000000 {
+			smmu: iommu@100000 {
 				compatible = "marvell,ap806-smmu-500", "arm,mmu-500";
 				reg = <0x100000 0x100000>;
 				dma-coherent;