Squashed 'connectivity/drivers/802.15.4_RF/stm-s2lp-rf-driver/' changes from 7d12478914..089ca0eed7

089ca0eed7 Merge pull request ARMmbed#78 from PelionIoT/sync_from_mbedos
f61d52dc77 Update copyright
36f14ee53a Sync from Mbed OS

git-subtree-dir: connectivity/drivers/802.15.4_RF/stm-s2lp-rf-driver
git-subtree-split: 089ca0eed7a6208fd7fe3e54e425d6669515ebf0

Author: artokin

CMakeLists.txt

@@ -0,0 +1,30 @@
+#################################################################################
+## Copyright 2020-2021 Pelion.
+##
+## SPDX-License-Identifier: Apache-2.0
+##
+## Licensed under the Apache License, Version 2.0 (the "License");
+## you may not use this file except in compliance with the License.
+## You may obtain a copy of the License at
+##
+##     http://www.apache.org/licenses/LICENSE-2.0
+##
+## Unless required by applicable law or agreed to in writing, software
+## distributed under the License is distributed on an "AS IS" BASIS,
+## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+## See the License for the specific language governing permissions and
+## limitations under the License.
+#################################################################################
+
+target_include_directories(mbed-802.15.4-rf
+    INTERFACE
+        stm-s2lp-rf-driver
+        source
+)
+
+target_sources(mbed-802.15.4-rf
+    INTERFACE
+        source/NanostackRfPhys2lp.cpp
+        source/at24mac_s2lp.cpp
+        source/rf_configuration.c
+)