Bluetooth: Coding style cleanup from previous rfcomm_init bug fix

The rfcomm_init bug fix went into the kernel premature before it got fully
reviewed and acknowledged by the Bluetooth maintainer. So fix up the coding
style now.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/rfcomm/core.c

@@ -2080,7 +2080,7 @@ static CLASS_ATTR(rfcomm_dlc, S_IRUGO, rfcomm_dlc_sysfs_show, NULL);
 /* ---- Initialization ---- */
 static int __init rfcomm_init(void)
 {
-	int ret;
+	int err;
 
 	l2cap_load();
 
@@ -2088,33 +2088,35 @@ static int __init rfcomm_init(void)
 
 	rfcomm_thread = kthread_run(rfcomm_run, NULL, "krfcommd");
 	if (IS_ERR(rfcomm_thread)) {
-		ret = PTR_ERR(rfcomm_thread);
-		goto out_thread;
+		err = PTR_ERR(rfcomm_thread);
+		goto unregister;
 	}
 
 	if (class_create_file(bt_class, &class_attr_rfcomm_dlc) < 0)
 		BT_ERR("Failed to create RFCOMM info file");
 
-	ret = rfcomm_init_ttys();
-	if (ret)
-		goto out_tty;
+	err = rfcomm_init_ttys();
+	if (err < 0)
+		goto stop;
 
-	ret = rfcomm_init_sockets();
-	if (ret)
-		goto out_sock;
+	err = rfcomm_init_sockets();
+	if (err < 0)
+		goto cleanup;
 
 	BT_INFO("RFCOMM ver %s", VERSION);
 
 	return 0;
 
-out_sock:
+cleanup:
 	rfcomm_cleanup_ttys();
-out_tty:
+
+stop:
 	kthread_stop(rfcomm_thread);
-out_thread:
+
+unregister:
 	hci_unregister_cb(&rfcomm_cb);
 
-	return ret;
+	return err;
 }
 
 static void __exit rfcomm_exit(void)