Bluetooth: Fix lockdep annotation on ERTM

A spin_lock_init() call was missing. :)

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index eb5cb29..6b08f4d 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -1622,7 +1622,7 @@
 	u16 control;
 	size_t size = 0;
 
-	__skb_queue_head_init(&sar_queue);
+	skb_queue_head_init(&sar_queue);
 	control = L2CAP_SDU_START;
 	skb = l2cap_create_iframe_pdu(sk, msg, pi->remote_mps, control, len);
 	if (IS_ERR(skb))