Driver core: remove subsys_put()

There are no more subsystems, it's a kset now so remove the function and
the only two users, which are in the driver core.


Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/base/class.c b/drivers/base/class.c
index cf9cf66..50e3413 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -100,7 +100,7 @@
 static void class_put(struct class * cls)
 {
 	if (cls)
-		subsys_put(&cls->subsys);
+		kset_put(&cls->subsys);
 }