scsi host sysfs support [3/4]

diff -puN drivers/scsi/scsi_sysfs.c~sysfs-scsi-subsys drivers/scsi/scsi_sysfs.c
@@ -107,10 +107,12 @@ static struct bus_type scsi_bus_type = {
         .match		= scsi_bus_match,
 };
 
+static decl_subsys(scsi, NULL);
 
 int scsi_sysfs_register(void)
 {
 	bus_register(&scsi_bus_type);
+	subsystem_register(&scsi_subsys);
 	devclass_register(&shost_devclass);
 
 	return 0;

@@ -119,6 +121,7 @@ int scsi_sysfs_register(void)
 void scsi_sysfs_unregister(void)
 {
 	devclass_unregister(&shost_devclass);
+	subsystem_unregister(&scsi_subsys);
 	bus_unregister(&scsi_bus_type);
 }