treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 310

Based on 1 normalized pattern(s):

may be copied or modified under the terms of the gnu general public
license version 2 [0] [only] see linux copying for more information

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner <[e-mail]>
Reviewed-by: Kate Stewart <[e-mail]>
Reviewed-by: Alexios Zavras <[e-mail]>
Reviewed-by: Allison Randal <[e-mail]>
Reviewed-by: Armijn Hemel <[e-mail]>
Cc: [e-mail]
Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/spi/spi-st-ssc4.c

···
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  Copyright (c) 2008-2014 STMicroelectronics Limited
  *
···
  *          Lee Jones <[e-mail]>
  *
  *  SPI master mode controller driver, used in STMicroelectronics devices.
- *
- *  May be copied or modified under the terms of the GNU General Public
- *  License Version 2.0 only.  See linux/COPYING for more information.
  */
 
 #include <linux/clk.h>