Garbage collect XFS bits which are now already completely disconnected
from the tree since few months.

This is not targeted for MFC.
- Complete r231621 by also blacklisting the bridge used by VMware for PCIe
  devices. While at it, update the comment now that we know that MSI-X
  doesn't work with ESXi 5.1 for Intel 82576 either and the underlying issue
  is a bug in the MSI-X allocation code of the hypervisor.
  Reported by: Harald Schmalzbauer
- Make the nomatch table const.

MFC after:	1 week