Merge branch 's390-qeth-fixes'

Julian Wiedmann says:

====================
s390/qeth: fixes 2019-10-08

Alexandra fixes two issues in the initialization code for vnicc cmds.
One is an uninitialized variable when a cmd fails, the other that we
wouldn't recover correctly if the device's supported features changed.
====================

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>