One of the things that this is improving is the fact that instead of error
message (that was wrong) you get when starting a domain with SMM and i440fx we
allow the setting to go through.  SMM option exists and makes sense on i440fx as
well (basically whenever that _SMM_OPT capability is set).
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>