treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 218

Based on 1 normalized pattern(s):

  you may use this code as per gpl version 2

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 5 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190528171439.762454146@linutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/power/supply/power_supply.h

+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  *  Functions private to power supply class
  *
@@ -6,8 +7,6 @@
  *  Copyright © 2003  Ian Molton <spyro@f2s.com>
  *
  *  Modified: 2004, Oct     Szabolcs Gyurko
- *
- *  You may use this code as per GPL version 2
  */
 
 struct device;

drivers/power/supply/power_supply_core.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  Universal power supply monitor class
  *
@@ -6,8 +7,6 @@
  *  Copyright © 2003  Ian Molton <spyro@f2s.com>
  *
  *  Modified: 2004, Oct     Szabolcs Gyurko
- *
- *  You may use this code as per GPL version 2
  */
 
 #include <linux/module.h>

drivers/power/supply/power_supply_leds.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  LEDs triggers for power supply class
  *
@@ -6,8 +7,6 @@
  *  Copyright © 2003  Ian Molton <spyro@f2s.com>
  *
  *  Modified: 2004, Oct     Szabolcs Gyurko
- *
- *  You may use this code as per GPL version 2
  */
 
 #include <linux/kernel.h>

drivers/power/supply/power_supply_sysfs.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  Sysfs interface for the universal power supply monitor class
  *
@@ -7,8 +8,6 @@
  *  Copyright © 2003  Ian Molton <spyro@f2s.com>
  *
  *  Modified: 2004, Oct     Szabolcs Gyurko
- *
- *  You may use this code as per GPL version 2
  */
 
 #include <linux/ctype.h>

include/linux/power_supply.h

+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  *  Universal power supply monitor class
  *
@@ -6,8 +7,6 @@
  *  Copyright © 2003  Ian Molton <spyro@f2s.com>
  *
  *  Modified: 2004, Oct     Szabolcs Gyurko
- *
- *  You may use this code as per GPL version 2
  */
 
 #ifndef __LINUX_POWER_SUPPLY_H__