IOMMU Updates for Linux v4.7 The updates include: * Rate limiting for the VT-d fault handler * Remove statistics code from the AMD IOMMU driver. It is unused and should be replaced by something more generic if needed * Per-domain pagesize-bitmaps in IOMMU core code to support systems with different types of IOMMUs * Support for ACPI devices in the AMD IOMMU driver * 4GB mode support for Mediatek IOMMU driver * ARM-SMMU updates from Will Deacon: - Support for 64k pages with SMMUv1 implementations (e.g MMU-401) - Remove open-coded 64-bit MMIO accessors - Initial support for 16-bit VMIDs, as supported by some ThunderX SMMU implementations - A couple of errata workarounds for silicon in the field * Various fixes here and there