netinfo: Move _devinfo out of _*info to avoid passing more parameters later

Change-Id: I0b59b9539ee759d06f44e51cf8bbddca52450ac5
Signed-off-by: Ondřej Svoboda <osvoboda@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/28700
Reviewed-by: Antoni Segura Puimedon <asegurap@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>