Merge branch 's390-net'

Ursula Braun says:

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s390/qeth patches for net

here are 2 s390/qeth patches built for net fixing a problem with AF_IUCV
traffic through HiperSockets.
And we come up with an update for the MAINTAINERS file to establish
Julian as Co-Maintainer for drivers/s390/net and net/iucv.
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Signed-off-by: David S. Miller <davem@davemloft.net>