kset: convert kernel_subsys to use kset_create

Dynamically create the kset instead of declaring it statically.  We also
rename kernel_subsys to kernel_kset to catch all users of this symbol
with a build error instead of an easy-to-ignore build warning.

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

diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 1330046..c4ee7f0 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -140,7 +140,7 @@
 	if (!configfs_dir_cachep)
 		goto out;
 
-	config_kobj = kobject_create_and_add("config", &kernel_subsys.kobj);
+	config_kobj = kobject_create_and_add("config", &kernel_kset->kobj);
 	if (!config_kobj) {
 		kmem_cache_destroy(configfs_dir_cachep);
 		configfs_dir_cachep = NULL;