net: Remove code duplication between offload structures

Move the offload callbacks into its own structure.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc include/linux/netdevice.h
Simple merge

diff --cc include/net/protocol.h
Simple merge

diff --cc net/core/dev.c
Simple merge

diff --cc net/ipv4/af_inet.c
Simple merge

diff --cc net/ipv6/ip6_offload.c
Simple merge

diff --cc net/ipv6/tcpv6_offload.c
Simple merge

diff --cc net/ipv6/udp_offload.c
Simple merge