These files do not contain a license reference and were not updated in the
initial SPDX conversion because the license was deduced by the scanners via
EXPORT_SYMBOL_GPL as GPL2.0 only.

Add the missing GPL-2.0 identifiers.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/irq/chip.c         |    1 +
 kernel/irq/devres.c       |    1 +
 kernel/irq/dummychip.c    |    1 +
 kernel/irq/generic-chip.c |    1 +
 kernel/irq/handle.c       |    1 +
 kernel/irq/ipi.c          |    1 +
 kernel/irq/irqdesc.c      |    1 +
 kernel/irq/irqdomain.c    |    2 ++
 kernel/irq/manage.c       |    1 +
 kernel/irq/pm.c           |    1 +
 10 files changed, 11 insertions(+)

--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
  * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
--- a/kernel/irq/devres.c
+++ b/kernel/irq/devres.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/device.h>
--- a/kernel/irq/dummychip.c
+++ b/kernel/irq/dummychip.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
  * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
--- a/kernel/irq/generic-chip.c
+++ b/kernel/irq/generic-chip.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Library implementing the most common irq chip callback functions
  *
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
  * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
--- a/kernel/irq/ipi.c
+++ b/kernel/irq/ipi.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2015 Imagination Technologies Ltd
  * Author: Qais Yousef <qais.yousef@imgtec.com>
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
  * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
+
 #define pr_fmt(fmt)  "irq: " fmt
 
 #include <linux/acpi.h>
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
  * Copyright (C) 2005-2006 Thomas Gleixner
--- a/kernel/irq/pm.c
+++ b/kernel/irq/pm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
  *