kobject: remove subsystem_(un)register functions

These functions are no longer used and are the last remants of the old
subsystem crap.  So delete them for good.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 6796d3e..871607b 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -854,7 +854,7 @@
 	bus->subsys.kobj.kset = bus_kset;
 	bus->subsys.kobj.ktype = &bus_ktype;
 
-	retval = subsystem_register(&bus->subsys);
+	retval = kset_register(&bus->subsys);
 	if (retval)
 		goto out;
 
@@ -900,7 +900,7 @@
 bus_devices_fail:
 	bus_remove_file(bus, &bus_attr_uevent);
 bus_uevent_fail:
-	subsystem_unregister(&bus->subsys);
+	kset_unregister(&bus->subsys);
 out:
 	return retval;
 }
@@ -920,7 +920,7 @@
 	kset_unregister(bus->drivers_kset);
 	kset_unregister(bus->devices_kset);
 	bus_remove_file(bus, &bus_attr_uevent);
-	subsystem_unregister(&bus->subsys);
+	kset_unregister(&bus->subsys);
 }
 
 int bus_register_notifier(struct bus_type *bus, struct notifier_block *nb)