Bluetooth: Rename __l2cap_chan_close() to l2cap_chan_close()

To make it consistent with the rest of the API.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 7d87d1f..b79fb75 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -707,7 +707,7 @@
 			err = __l2cap_wait_ack(sk);
 
 		sk->sk_shutdown = SHUTDOWN_MASK;
-		__l2cap_chan_close(chan, 0);
+		l2cap_chan_close(chan, 0);
 
 		if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
 			err = bt_sock_wait_state(sk, BT_CLOSED,