Add ESP-32 driver

connectivity/drivers/wifi/CMakeLists.txt

@@ -36,3 +36,8 @@ if("COMPONENT_ESPRESSIF_ESP8266=1" IN_LIST MBED_TARGET_DEFINITIONS)
     add_subdirectory(COMPONENT_ESPRESSIF_ESP8266)
 endif()
 
+if("COMPONENT_ESPRESSIF_ESP32=1" IN_LIST MBED_TARGET_DEFINITIONS)
+	create_mbed_wifi_target()
+    add_subdirectory(COMPONENT_ESPRESSIF_ESP32)
+endif()
+

connectivity/drivers/wifi/COMPONENT_ESPRESSIF_ESP32/CMakeLists.txt

@@ -0,0 +1,16 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+target_sources(mbed-wifi
+    PRIVATE
+        ./ESP32Interface.cpp
+        ./ESP32InterfaceAP.cpp
+        ./ESP32Stack.cpp
+        ./ESP32/ESP32.cpp
+)
+
+target_include_directories(mbed-wifi
+    PUBLIC
+        ./
+        ./ESP32/
+)