Merge branch 's390-qeth-next'

Julian Wiedmann says:

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s390/qeth: updates 2018-11-08

please apply the following qeth patches to net-next.

The first patch allows one more device type to query the FW for a MAC address,
the others are all basically just removal of duplicated or unused code.
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Signed-off-by: David S. Miller <davem@davemloft.net>