John Baldwin a38f0dafb5 Fix an off by one error when remapping MSI-X vectors.
pci_remap_msix() can be used to alter the mapping of allocated
MSI-X vectors to the MSI-X table.  The code had an off by one error
when adding the IRQ resources after performing a remap.  This was
fatal for any vectors in the table that used the "last" valid IRQ as
those vectors were assigned a garbage IRQ value.

MFC after:	3 days
2016-05-03 00:35:11 +00:00
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