s390x: protvirt: Handle SIGP store status correctly

s390x: protvirt: Handle SIGP store status correctly

For protected VMs status storing is not done by QEMU anymore.

Signed-off-by: Janosch Frank <[email protected]>
Reviewed-by: Thomas Huth <[email protected]>
Reviewed-by: David Hildenbrand <[email protected]>
Reviewed-by: Christian Borntraeger <[email protected]>
Reviewed-by: Claudio Imbrenda <[email protected]>
Reviewed-by: Cornelia Huck <[email protected]>
Message-Id: <20200319131921[email protected]>
Signed-off-by: Cornelia Huck <[email protected]>