base64: update spdx tag

The code is a copy from the nvme-cli project which was licesenced under
the GPL-2.0-or-later license. The library is LGPL-2.1-or-later. Hannes
agreed to relicense this code.

Signed-off-by: Hannes Reinecke <[email protected]>
Signed-off-by: Daniel Wagner <[email protected]>

Author: igaw

libnvme/src/nvme/base64.c

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
+// SPDX-License-Identifier: LGPL-2.1-or-later
 /*
  * base64.c - RFC4648-compliant base64 encoding
  *

libnvme/src/nvme/base64.h

@@ -1,8 +1,8 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-#ifndef _BASE64_H
-#define _BASE64_H
+// SPDX-License-Identifier: LGPL-2.1-or-later
+/*
+ * This file is part of libnvme.
+ */
+#pragma once
 
 int base64_encode(const unsigned char *src, int len, char *dst);
 int base64_decode(const char *src, int len, unsigned char *dst);
-
-#endif /* _BASE64_H */