The function is just a helper to handle the -global options, it
can stay in vl.c like most qemu_opts_foreach() calls.
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>