crypto/cavium MSI-X fixups

[Christoph Hellwig]

Hi George,

your commit "crypto: cavium - Add Support for Octeon-tx CPT Engine"
add a new caller to pci_enable_msix.  This API has long been deprecated
so this series switches it to use pci_alloc_irq_vectors instead.

Can you please test it and make sure it goes in before the end of the
merge window so that no more users of the old API hit mainline?