compute: Specify the primary video device explicitly
compute: Specify the primary video device explicitly

To work around libvirt bug
https://bugzilla.redhat.com/show_bug.cgi?id=1325757

Signed-off-by: Juerg Haefliger <71fc62073a74bb0183c934981fc15cc10b5a6493@hpe.com>

dtroyer/dwarf,juergh/dwarf,juergh/dwarf,dtroyer/dwarf