platform/x86: intel_turbo_max_3: Convert to use SPDX identifier

Reduce size of duplicated comments by switching to use SPDX identifier.

No functional change.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/x86/intel_turbo_max_3.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Intel Turbo Boost Max Technology 3.0 legacy (non HWP) enumeration driver
  * Copyright (c) 2017, Intel Corporation.
  * All rights reserved.
  *
  * Author: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
  */
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt