[patch V2 04/11] LICENSES: Add the LGPL-2.1 license

[Thomas Gleixner <tglx@linutronix.de>]

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Add the full text of the LGPL 2.1 license to the kernel tree.  It was
copied directly from:

   https://spdx.org/licenses/LGPL-2.1.html#licenseText

Add the required tags for reference and tooling.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 LICENSES/preferred/LGPL-2.1 |  503 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 503 insertions(+)

--- /dev/null
+++ b/LICENSES/preferred/LGPL-2.1
@@ -0,0 +1,503 @@
+Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1+
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
+Usage-Guide:
+  To use this license in source code, put one of the following SPDX
+  tag/value pairs into a comment according to the placement
+  guidelines in the licensing rules documentation.
+  For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
+    SPDX-License-Identifier: LGPL-2.1
+  For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
+  version' use:
+    SPDX-License-Identifier: LGPL-2.1+
+License-Text:
+
+GNU LESSER GENERAL PUBLIC LICENSE
+Version 2.1, February 1999
+
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