Merge branch 's390-next'

Julian Wiedmann says:

====================
s390/qeth: updates 2019-10-31

please apply the following series of spooky qeth updates for net-next.

The first two patches add support for an enhanced TX doorbell, which
enables us to do more xmit_more-based bulking.
Note that this requires one patch for the s390/qdio base layer, which
has been graciously acked by Heiko to go through your tree.

The remaining patches are just the usual minor cleanups/improvements.
====================

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