Bluetooth: Add Copyright notice to L2CAP

Copyright for the time I worked on L2CAP during the Google Summer of Code
program.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/l2cap.c

@@ -1,6 +1,7 @@
 /*
    BlueZ - Bluetooth protocol stack for Linux
    Copyright (C) 2000-2001 Qualcomm Incorporated
+   Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org>
 
    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>