Reduce size of duplicated comments by switching to use SPDX identifier.
No functional change.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+// SPDX-License-Identifier: GPL-2.0
/*
* Driver for the Intel P-Unit Mailbox IPC mechanism
*
* (C) Copyright 2015 Intel Corporation
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
* The heart of the P-Unit is the Foxton microcontroller and its firmware,
* which provide mailbox interface for power management usage.
*/