Multiple MFC for ixgbe -- v 3.1.0

Multiple MFC for ixgbe -- v 3.1.0

r283883
-- update to 3.1.0

r283893
-- update SRIOV API changes related to future possible MFC of SRIOV work

r285590
-- Fix ixgbe(4) SRIOV VF initialization bugs

r285591
-- Remove version check for FLOWID

r285592
-- Update netmap support for ixgbe SRIOV VFs, needs ixgbe_netmap.h merge

r286238
-- Fixup MTU zeroing if INET/INET6 are undefined.

Submitted by:   kevin bowling (kevin.bowling@kev009.com)
Reviewed by:    smh
Relnotes:       Yes
Sponsored by:   Limelight Networks
Differential Revision:	https://reviews.freebsd.org/D4273

git-svn-id: svn://svn.freebsd.org/base/stable/10@294061 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f