IOMMU Fixes for Linux v3.17-rc1

The fixes include:

	* A patch to fix a crash in the VT-d driver when devices with a
	  driver attached are hot-unplugged

	* A patch for the AMD IOMMU driver to fix a crash with device
	  assignment of 32 bit PCI devices to KVM guests

	* Fix for a copy&paste error in generic IOMMU code. Now the
	  right function pointer is checked before calling.
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