[Bluetooth] Initialize net_proto_family->owner field. This covers only HCI sockets.

Other protocols cannot be fixes at this point because current net_proto_family
code does not support "family owner != socket owner" case.

net/bluetooth/af_bluetooth.c

@@ -321,6 +321,7 @@ int bt_sock_w4_connect(struct sock *sk, int flags)
 }
 
 struct net_proto_family bt_sock_family_ops = {
+	.owner  = THIS_MODULE,
 	.family	= PF_BLUETOOTH,
 	.create	= bt_sock_create,
 };

net/bluetooth/hci_sock.c

@@ -161,8 +161,6 @@ static int hci_sock_release(struct socket *sock)
 	skb_queue_purge(&sk->write_queue);
 
 	sock_put(sk);
-
-	MOD_DEC_USE_COUNT;
 	return 0;
 }
 
@@ -591,8 +589,6 @@ static int hci_sock_create(struct socket *sock, int protocol)
 	sk->state   = BT_OPEN;
 
 	bt_sock_link(&hci_sk_list, sk);
-
-	MOD_INC_USE_COUNT;
 	return 0;
 }