Merge branch 'sfc-encap-offloads-on-EF10'

Edward Cree says:

====================
sfc: encap offloads on EF10

EF10 NICs from the 8000 series onwards support TX offloads (checksumming,
 TSO) on VXLAN- and NVGRE-encapsulated packets.  This series adds driver
 support for these offloads.

Changes from v1:
 * Fix 'no TXQ of type' error handling in patch #1 (and clear up the
   misleading comment that inspired the wrong version)
 * Add comment in patch #5 explaining what the deal with TSOv3 is
====================

Signed-off-by: David S. Miller <davem@davemloft.net>