Bluetooth: Add missing braces to an "else if"

Trivial change in the coding style.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

net/bluetooth/l2cap_core.c

@@ -1415,8 +1415,9 @@ static void l2cap_conn_ready(struct l2cap_conn *conn)
 			sk->sk_state_change(sk);
 			release_sock(sk);
 
-		} else if (chan->state == BT_CONNECT)
+		} else if (chan->state == BT_CONNECT) {
 			l2cap_do_start(chan);
+		}
 
 		l2cap_chan_unlock(chan);
 	}