ixgbe: Drop references to deprecated pci_ DMA api and instead use dma_ API

The networking side of the code had already been updated to use dma_ calls
instead of the old pci_ calls. However it looks like the FCoE code was
never updated.  This change goes through and moves everything from the pci
APIs to the dma APIs.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>