bluetooth: Fix warnings in l2cap_core.c

net/bluetooth/l2cap_core.c: In function ‘l2cap_recv_frame’:
net/bluetooth/l2cap_core.c:3758:15: warning: ‘sk’ may be used uninitialized in this function
net/bluetooth/l2cap_core.c:3758:15: note: ‘sk’ was declared here
net/bluetooth/l2cap_core.c:3791:15: warning: ‘sk’ may be used uninitialized in this function
net/bluetooth/l2cap_core.c:3791:15: note: ‘sk’ was declared here

Signed-off-by: David S. Miller <davem@davemloft.net>

net/bluetooth/l2cap_core.c

@@ -3755,7 +3755,7 @@ done:
 
 static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb)
 {
-	struct sock *sk;
+	struct sock *sk = NULL;
 	struct l2cap_chan *chan;
 
 	chan = l2cap_global_chan_by_psm(0, psm, conn->src);
@@ -3788,7 +3788,7 @@ done:
 
 static inline int l2cap_att_channel(struct l2cap_conn *conn, __le16 cid, struct sk_buff *skb)
 {
-	struct sock *sk;
+	struct sock *sk = NULL;
 	struct l2cap_chan *chan;
 
 	chan = l2cap_global_chan_by_scid(0, cid, conn->src);