Merge branch 's390-net-next'

Julian Wiedmann says:

====================
s390/net: updates 2018-09-26

please apply one more series of cleanups and small improvements for qeth
to net-next. Note that one patch needs to touch both af_iucv and qeth, in
order to untangle their receive paths.
====================

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