iommu-updates-v3.16

The changes include:

	* A new IOMMU driver for ARM Renesas SOCs

	* Updates and fixes for the ARM Exynos driver to bring it closer
	  to a usable state again

	* Convert the AMD IOMMUv2 driver to use the
	  mmu_notifier->release call-back instead of the task_exit
	  notifier

	* Random other fixes and minor improvements to a number of other
	  IOMMU drivers