treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 51

Based on 1 normalized pattern(s):

this program is distributed in the hope that 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 this program is free
software you can redistribute it and or modify it under the terms of
the gnu general public license version 2 or later as publishhed by
the free software foundation

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-or-later

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

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

drivers/hwmon/ads7871.c

···
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  ads7871 - driver for TI ADS7871 A/D converter
  *
  *  Copyright (c) 2010 Paul Thomas <[e-mail]>
- *
- *  This program is distributed in the hope that 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.
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2 or
- *  later as publishhed by the Free Software Foundation.
  *
  *	You need to have something like this in struct spi_board_info
  *	{