qmp: Add qom_path field to query-cpus command This will allow clients to query additional information directly using qom-get on the CPU objects. Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>