Add license files

Author: Michael Schwarcz

LICENSE.md

@@ -21,7 +21,7 @@ Folders containing files under different permissive license than Apache 2.0 are
 - [drivers](./drivers) - MIT
 - [TESTS/mbed_hal/trng/pithy](./TESTS/mbed_hal/trng/pithy) - BSD-3-Clause
 - [tools/data/rpc](./tools/data/rpc) - MIT
-- [targets](./targets) - PBL, BSD-style, MIT-style, Zlib-style, Public-domain
+- [targets](./targets) - PBL, BSD-style, MIT-style, Zlib-style, Public-domain, BSD-3-Clause
 
 The Python modules used by Mbed tools are used under the following licenses:
 

targets/TARGET_ARM_SSG/TARGET_MUSCA_A1/LICENSE

@@ -0,0 +1,2 @@
+Unless specifically indicated otherwise in a file, MUSCA_A1 files in this directory are licensed under the BSD-3-Clause license,
+as can be found in: LICENSE-bsd-3-clause.txt

targets/TARGET_ARM_SSG/TARGET_MUSCA_A1/LICENSE-BSD-3-Clause

@@ -0,0 +1,26 @@
+Copyright 2019 Arm Limited and affiliates.
+SPDX-License-Identifier: BSD-3-Clause
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+3. Neither the name of the copyright holder nor the
+   names of its contributors may be used to endorse or promote products
+   derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.