Without this default q35/ppc405 based machines would no longer boot
after commit e4ada29eSigned-off-by: NKnut Omang <knut.omang@oracle.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>