treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 223

Based on 1 normalized pattern(s):

  subject to the gnu public license v 2

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 9 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190528171440.130801526@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/x86/kernel/apic/apic_flat_64.c

@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright 2004 James Cleverdon, IBM.
- * Subject to the GNU Public License, v.2
  *
  * Flat APIC subarch code.
  *

arch/x86/kernel/apic/probe_32.c

@@ -1,8 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Default generic APIC driver. This handles up to 8 CPUs.
  *
  * Copyright 2003 Andi Kleen, SuSE Labs.
- * Subject to the GNU Public License, v.2
  *
  * Generic x86 APIC driver probe layer.
  */

arch/x86/kernel/apic/probe_64.c

@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright 2004 James Cleverdon, IBM.
- * Subject to the GNU Public License, v.2
  *
  * Generic APIC sub-arch probe layer.
  *