driver core: make /sys/power a kobject

/sys/power should not be a kset, that's overkill.  This patch renames it
to power_kset and fixes up all usages of it in the tree.

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

diff --git a/kernel/power/main.c b/kernel/power/main.c
index b813949..efc0836 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -276,7 +276,7 @@
 
 #endif /* CONFIG_SUSPEND */
 
-struct kset *power_kset;
+struct kobject *power_kobj;
 
 /**
  *	state - control system power state.
@@ -389,10 +389,10 @@
 
 static int __init pm_init(void)
 {
-	power_kset = kset_create_and_add("power", NULL, NULL);
-	if (!power_kset)
+	power_kobj = kobject_create_and_add("power", NULL);
+	if (!power_kobj)
 		return -ENOMEM;
-	return sysfs_create_group(&power_kset->kobj, &attr_group);
+	return sysfs_create_group(power_kobj, &attr_group);
 }
 
 core_initcall(pm_init);