ixgbe: Cleanup holes in flags after removing several of them

This change is just meant to defragment the flags as there are several hole
that have been introduced since several features, or the flags for them,
have been removed.

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>