Avoid deprecated SPDX license Identifier "GPL-2.0"

This had the semantic of current Identifier "GPL-2.0-only", so switch to
that.

Signed-off-by: Jan Kiszka <[email protected]>

Author: jan-kiszka

.editorconfig

@@ -5,7 +5,7 @@
 # This work is licensed under the terms of the GNU GPL, version 2.  See
 # the COPYING file in the top-level directory.
 #
-# SPDX-License-Identifier:	GPL-2.0
+# SPDX-License-Identifier:	GPL-2.0-only
 
 # This file is meant to set up your editor, see https://editorconfig.org.
 root = true

.github/workflows/coverity.yaml

@@ -10,7 +10,7 @@
 # This work is licensed under the terms of the GNU GPL, version 2.  See
 # the COPYING file in the top-level directory.
 #
-# SPDX-License-Identifier:      GPL-2.0
+# SPDX-License-Identifier:      GPL-2.0-only
 #
 
 name: Coverity Scan

.github/workflows/main.yaml

@@ -10,7 +10,7 @@
 # This work is licensed under the terms of the GNU GPL, version 2.  See
 # the COPYING file in the top-level directory.
 #
-# SPDX-License-Identifier:      GPL-2.0
+# SPDX-License-Identifier:      GPL-2.0-only
 #
 
 name: CI

Makefile.am

@@ -9,7 +9,7 @@
 # This work is licensed under the terms of the GNU GPL, version 2.  See
 # the COPYING file in the top-level directory.
 #
-# SPDX-License-Identifier:	GPL-2.0
+# SPDX-License-Identifier:	GPL-2.0-only
 #
 # Based on Makefile.am of gummiboot,
 # Copyright (C) 2013 Karel Zak <[email protected]>

bootguard.c

@@ -9,7 +9,7 @@
  * This work is licensed under the terms of the GNU GPL, version 2.  See
  * the COPYING file in the top-level directory.
  *
- * SPDX-License-Identifier:	GPL-2.0
+ * SPDX-License-Identifier:	GPL-2.0-only
  */
 
 #include "bootguard.h"

completion/bg_printenv/cli.py

@@ -7,7 +7,7 @@
 # This work is licensed under the terms of the GNU GPL, version 2.  See
 # the COPYING file in the top-level directory.
 #
-# SPDX-License-Identifier:	GPL-2.0
+# SPDX-License-Identifier:	GPL-2.0-only
 
 import argparse
 

completion/bg_setenv/cli.py

@@ -7,7 +7,7 @@
 # This work is licensed under the terms of the GNU GPL, version 2.  See
 # the COPYING file in the top-level directory.
 #
-# SPDX-License-Identifier:	GPL-2.0
+# SPDX-License-Identifier:	GPL-2.0-only
 
 import argparse
 

completion/common.py

@@ -7,7 +7,7 @@
 # This work is licensed under the terms of the GNU GPL, version 2.  See
 # the COPYING file in the top-level directory.
 #
-# SPDX-License-Identifier:	GPL-2.0
+# SPDX-License-Identifier:	GPL-2.0-only
 
 import shtab
 

configure.ac

@@ -10,7 +10,7 @@
 # This work is licensed under the terms of the GNU GPL, version 2.  See
 # the COPYING file in the top-level directory.
 #
-# SPDX-License-Identifier:	GPL-2.0
+# SPDX-License-Identifier:	GPL-2.0-only
 #
 # Based on configure.ac of gummiboot,
 # Copyright (C) 2013 Karel Zak <[email protected]>

drivers/utils/simatic.c

@@ -11,7 +11,7 @@
  * This work is licensed under the terms of the GNU GPL, version 2.  See
  * the COPYING file in the top-level directory.
  *
- * SPDX-License-Identifier:	GPL-2.0
+ * SPDX-License-Identifier:	GPL-2.0-only
  */
 
 #include <efi.h>