Merge branch 'Improve packet offload for dual stack'

Merge branch 'Improve packet offload for dual stack'

Mike Yu says:
====================
In the XFRM stack, whether a packet is forwarded to the IPv4
or IPv6 stack depends on the family field of the matched SA.
This does not completely work for IPsec packet offload in some
scenario, for example, sending an IPv6 packet that will be
encrypted and encapsulated as an IPv4 packet in HW.

Here are the patches to make IPsec packet offload work on the
mentioned scenario.
====================

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>