Merge git://git.infradead.org/iommu-2.6

* git://git.infradead.org/iommu-2.6:
  intel-iommu: fix endless "Unknown DMAR structure type" loop
  VT-d: handle Invalidation Queue Error to avoid system hang
  intel-iommu: fix build error with INTR_REMAP=y and DMAR=n