ipv6: Separate out UDP offload functionality

Pull UDP GSO code into a separate file in preparation for moving
the code out of the module.

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

diff --cc net/ipv6/Makefile
Simple merge

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

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

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