Bluetooth: Add __init and __exit marks to RFCOMM

Those annotation save memory and space on the binary. __init code is
discarded just after execute and __exit code is discarded if the module
is built into the kernel image or unload of modules is not allowed.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index 43fbf6b..44a6232 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -1152,7 +1152,7 @@
 	return err;
 }
 
-void rfcomm_cleanup_sockets(void)
+void __exit rfcomm_cleanup_sockets(void)
 {
 	debugfs_remove(rfcomm_sock_debugfs);