[OSS-Tools] [PATCH dt-utils v2 4/9] treewide: add SPDX identifier to file with Zlib license

[Roland Hieber <rhi@pengutronix.de>]

We don't have any zlib.h anyway, so the line in src/crc32.c is
meaningless. Add Zlib license from the SPDX website [1].

  [1]: https://spdx.org/licenses/Zlib.html

Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Roland Hieber <rhi@pengutronix.de>
---
PATCH v2:
 * add LICENSES/Zlib.txt

PATCH v1: https://lore.pengutronix.org/oss-tools/20210326210647.8648-3-rhi@pengutronix.de
---
 LICENSES/Zlib.txt | 19 +++++++++++++++++++
 src/crc32.c       |  2 +-
 2 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 LICENSES/Zlib.txt

diff --git a/LICENSES/Zlib.txt b/LICENSES/Zlib.txt
new file mode 100644
index 000000000000..4dd43e509207
--- /dev/null
+++ b/LICENSES/Zlib.txt
@@ -0,0 +1,19 @@
+zlib License
+
+This software is provided 'as-is', without any express or implied warranty.  In
+no event will the authors be held liable for any damages arising from the use of
+this software.
+
+Permission is granted to anyone to use this software for any purpose, including
+commercial applications, and to alter it and redistribute it freely, subject to
+the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not claim
+   that you wrote the original software. If you use this software in a product,
+   an acknowledgment in the product documentation would be appreciated but is
+   not required.
+
+2. Altered source versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+
+3. This notice may not be removed or altered from any source distribution.
diff --git a/src/crc32.c b/src/crc32.c
index 8273d3465f6f..469dac3a5b27 100644
--- a/src/crc32.c
+++ b/src/crc32.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Zlib */
 /*
  * This file is derived from crc32.c from the zlib-1.1.3 distribution
  * by Jean-loup Gailly and Mark Adler.
@@ -5,7 +6,6 @@
 
 /* crc32.c -- compute the CRC-32 of a data stream
  * Copyright (C) 1995-1998 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
 #include <dt/common.h>
-- 
2.39.2