KVM: s390: take care of clock-comparator sign control

KVM: s390: take care of clock-comparator sign control

Missed when enabling the Multiple-epoch facility. If the facility is
installed and the control is set, a sign based comaprison has to be
performed.

Right now we would inject wrong interrupts and ignore interrupt
conditions. Also the sleep time is calculated in a wrong way.

Signed-off-by: David Hildenbrand <[email protected]>
Message-Id: <20180207114647[email protected]>
Fixes: 8fa1696ea781 ("KVM: s390: Multiple Epoch Facility support")
Cc: [email protected]
Reviewed-by: Christian Borntraeger <[email protected]>
Signed-off-by: Christian Borntraeger <[email protected]>