mac99: Use MACHINE_TYPE_NAME to encode class name

It will result in exactly the same class name, but it will make the code
consistent with the other classes.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Andreas Färber <afaerber@suse.de>

hw/ppc/mac_newworld.c

@@ -517,7 +517,7 @@ static void core99_machine_class_init(ObjectClass *oc, void *data)
 }
 
 static const TypeInfo core99_machine_info = {
-    .name          = "mac99-machine",
+    .name          = MACHINE_TYPE_NAME("mac99"),
     .parent        = TYPE_MACHINE,
     .class_init    = core99_machine_class_init,
 };