hardware: recognize s390 as valid deployment host
hardware: recognize s390 as valid deployment host

Recognize s390 CPU and identify virtualization capability.
These changes are required by ovirt-engine to allow
adding s390 hosts to a cluster.

Change-Id: Idd6f3164b8d8cdfd2bf34c499edf57b2daf1f479
Signed-off-by: Viktor Mihajlovski <a96a137ca8976b5ff3114c85be7aeb3b6464dad7@linux.vnet.ibm.com>

oVirt/ovirt-host-deploy,oVirt/ovirt-host-deploy,oVirt/ovirt-host-deploy