Merge remote-tracking branch 'awilliam/tags/vfio-pci-for-qemu-20121008.0' into staging

* awilliam/tags/vfio-pci-for-qemu-20121008.0:
  vfio-pci: Fix BAR->VFIODevice translation in
  vfio-pci: Clang cleanup
  vfio-pci: Cleanup on INTx setup failure
  vfio-pci: Extend reset
  vfio-pci: Remove setting of MSI qsize
  vfio-pci: Use uintptr_t for void* cast
  vfio-pci: Don't peak at msi_supported
  vfio-pci: Roll the header into the .c file
  vfio-pci: No spurious MSIs
  vfio-pci: Rework MSIX setup/teardown
  vfio-pci: Unmap and retry DMA mapping
  vfio-pci: Re-order map/unmap
  vfio-pci: Update slow path INTx algorithm