Merge branch 'net-ufo-remove'

David S. Miller says:

====================
net: Remove UDP Fragmentation Offload support

This is a patch series, based upon some discussions with various
developers, that removes UFO offloading.

Very few devices support this operation, it's usefullness is
quesitonable at best, and it adds a non-trivial amount of
complexity to our data paths.

v2: Delete more code thanks to feedback from Willem.
====================

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