dlm: add __init and __exit marks to init and exit functions

it moves 365 bytes from .text to .init.text, and 30 bytes from .text to
.exit.text, saves memory.

Signed-off-by: Denis Cheng <crquan@gmail.com>
Signed-off-by: David Teigland <teigland@redhat.com>
diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index 2f8e3c8..c3ad1df 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -604,7 +604,7 @@
 	},
 };
 
-int dlm_config_init(void)
+int __init dlm_config_init(void)
 {
 	config_group_init(&clusters_root.subsys.su_group);
 	mutex_init(&clusters_root.subsys.su_mutex);