iommu-fixes-v4.7-rc3

Three patches queued up:

	* Fix for ARM-SMMU to add a missing iommu-ops callback which is
	  required by common iommu code

	* Fix for the rockchip iommu where the wrong MMUs got the
	  commands

	* A regression fix for the Intel VT-d driver. The regression
	  only showed up on X58 chipsets with more than one iommu. These
	  chipsets seem to require that QI is enabled on all IOMMUs
	  before it can be used.