LICENSES: Remove the use of deprecated SPDX tags

The GPL and LGPL SPDX forms without an explicit -only or -or-later suffix are
deprecated and should not be used.  Update the documention.

Somewhat unhelpfully at the time of writing, this only appears to be indicated
by the separation of the two tables at https://spdx.org/licenses/

The recent changes to libacpi are the only examples of deprecated LGPL tags in
tree, so fix them all up.

For GPL, we have many examples using deprecated tags.  For now, just identify
them as such and recommend that no new instances get added.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>

LICENSES/GPL-2.0

@@ -1,9 +1,11 @@
-Valid-License-Identifier: GPL-2.0
 Valid-License-Identifier: GPL-2.0-only
-Valid-License-Identifier: GPL-2.0+
 Valid-License-Identifier: GPL-2.0-or-later
 
-SPDX-URL: https://spdx.org/licenses/GPL-2.0.html
+SPDX-URL: https://spdx.org/licenses/GPL-2.0-only.html
+SPDX-URL: https://spdx.org/licenses/GPL-2.0-or-later.html
+
+Deprecated-Identifier: GPL-2.0
+Deprecated-Identifier: GPL-2.0+
 
 Usage-Guide:
 
@@ -13,14 +15,13 @@ Usage-Guide:
 
   For 'GNU General Public License (GPL) version 2 only' use:
     SPDX-License-Identifier: GPL-2.0-only
-  or (now deprecated)
-    SPDX-License-Identifier: GPL-2.0
 
   For 'GNU General Public License (GPL) version 2 or any later version' use:
-    SPDX-License-Identifier: GPL-2.0+
-  or
     SPDX-License-Identifier: GPL-2.0-or-later
 
+  The deprecated tags should not be used for any new additions.  Where
+  possible, their existing uses should be phased out.
+
 License-Text:
 
 		    GNU GENERAL PUBLIC LICENSE

LICENSES/LGPL-2.0

@@ -1,7 +1,8 @@
-Valid-License-Identifier: LGPL-2.0
-Valid-License-Identifier: LGPL-2.0+
+Valid-License-Identifier: LGPL-2.0-only
+Valid-License-Identifier: LGPL-2.0-or-later
 
-SPDX-URL: https://spdx.org/licenses/LGPL-2.0.html
+SPDX-URL: https://spdx.org/licenses/LGPL-2.0-only.html
+SPDX-URL: https://spdx.org/licenses/LGPL-2.0-or-later.html
 
 Usage-Guide:
 
@@ -10,11 +11,11 @@ Usage-Guide:
   guidelines in the licensing rules documentation.
 
   For 'GNU Library General Public License (LGPL) version 2.0 only' use:
-    SPDX-License-Identifier: LGPL-2.0
+    SPDX-License-Identifier: LGPL-2.0-only
 
   For 'GNU Library General Public License (LGPL) version 2.0 or any later
   version' use:
-    SPDX-License-Identifier: LGPL-2.0+
+    SPDX-License-Identifier: LGPL-2.0-or-later
 
 License-Text:
 

LICENSES/LGPL-2.1

@@ -1,7 +1,8 @@
-Valid-License-Identifier: LGPL-2.1
-Valid-License-Identifier: LGPL-2.1+
+Valid-License-Identifier: LGPL-2.1-only
+Valid-License-Identifier: LGPL-2.1-or-later
 
-SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1-only.html
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1-or-later.html
 
 Usage-Guide:
 
@@ -10,11 +11,11 @@ Usage-Guide:
   guidelines in the licensing rules documentation.
 
   For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
-    SPDX-License-Identifier: LGPL-2.1
+    SPDX-License-Identifier: LGPL-2.1-only
 
   For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
   version' use:
-    SPDX-License-Identifier: LGPL-2.1+
+    SPDX-License-Identifier: LGPL-2.1-or-later
 
 License-Text:
 

tools/libacpi/Makefile

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: LGPL-2.1
+# SPDX-License-Identifier: LGPL-2.1-only
 #
 # Copyright (c) 2004, Intel Corporation.
 

tools/libacpi/acpi2_0.h

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1 */
+/* SPDX-License-Identifier: LGPL-2.1-only */
 /*
  * Copyright (c) 2004, Intel Corporation.
  */

tools/libacpi/build.c

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1 */
+/* SPDX-License-Identifier: LGPL-2.1-only */
 /*
  * Copyright (c) 2004, Intel Corporation.
  * Copyright (c) 2006, Keir Fraser, XenSource Inc.

tools/libacpi/dsdt.asl

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1 */
+/* SPDX-License-Identifier: LGPL-2.1-only */
 /******************************************************************************
  * DSDT for Xen with Qemu device model
  *

tools/libacpi/dsdt_acpi_info.asl

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1 */
+/* SPDX-License-Identifier: LGPL-2.1-only */
 
     Scope (\_SB)
     {

tools/libacpi/libacpi.h

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1 */
+/* SPDX-License-Identifier: LGPL-2.1-only */
 /******************************************************************************
  * libacpi.h
  * 

tools/libacpi/mk_dsdt.c

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1 */
+/* SPDX-License-Identifier: LGPL-2.1-only */
 
 #include <stdio.h>
 #include <stdarg.h>

tools/libacpi/ssdt_laptop_slate.asl

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1 */
+/* SPDX-License-Identifier: LGPL-2.1-only */
 /*
  * ssdt_conv.asl
  *

tools/libacpi/ssdt_pm.asl

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1 */
+/* SPDX-License-Identifier: LGPL-2.1-only */
 /*
  * ssdt_pm.asl
  *

tools/libacpi/ssdt_s3.asl

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1 */
+/* SPDX-License-Identifier: LGPL-2.1-only */
 /*
  * ssdt_s3.asl
  *

tools/libacpi/ssdt_s4.asl

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1 */
+/* SPDX-License-Identifier: LGPL-2.1-only */
 /*
  * ssdt_s4.asl
  *

tools/libacpi/ssdt_tpm.asl

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1 */
+/* SPDX-License-Identifier: LGPL-2.1-only */
 /*
  * ssdt_tpm.asl
  *

tools/libacpi/static_tables.c

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: LGPL-2.1 */
+/* SPDX-License-Identifier: LGPL-2.1-only */
 /*
  * Copyright (c) 2004, Intel Corporation.
  * Copyright (c) 2006, Keir Fraser, XenSource Inc.