docs: Add licensing seciton for external projects.

Signed-off-by: Atish Patra <atish.patra@wdc.com>

diff --git a/README.md b/README.md
index 2e45521..f629046 100644 (file)
--- a/README.md
+++ b/README.md
@@ -83,6 +83,19 @@ In addition, platform specific make command-line options to top-level make
 options are described under *`docs/platform/<platform_name>.md`* and
 *`docs/firmware/<firmware_name>.md`*.
 
+License
+-------------
+The software is provided under a BSD-2-Clause license. Contributions to this
+project are accepted under the same license with developer sign-off as
+described in the [Contributing Guidelines] [docs/contributing.md].
+
+This project also contains code from other projects as listed below. The original
+license text is included in those source files.
+
+1. The libfdt source code is disjunctively dual licensed (GPL-2.0+ OR BSD-2-Clause). It is
+   used by this project under the terms of the BSD-2-Clause license. Any contributions to
+   this code must be made under the terms of both licenses.
+
 Documentation
 -------------