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