[S390] sclp: invalid handling of temporary 'not operational' status

Requests are aborted when the sclp interface reports 'not operational'
even though they may still be active at the sclp, leading to concurrent
writes to request memory by both the kernel and the sclp interface.
Do not abort requests for which the sclp interface reports not
operational status during request retry.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com&gt;5A>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>