Update Mbed configuration

config/mbed/chip-gn/.gn

@@ -20,7 +20,7 @@ check_system_includes = true
 
 default_args = {
   target_cpu = "arm"
-  target_os = "mbed-os"
+  target_os = "mbed"
 
   import("//args.gni")
 }

config/mbed/chip-gn/BUILD.gn

@@ -15,8 +15,10 @@
 import("//build_overrides/chip.gni")
 
 import("//${chip_root}/build/chip/tests.gni")
+import("//build_overrides/mbedtls.gni")
+import("${mbedtls_root}/mbedtls.gni")
 
-assert(current_os == "mbed-os")
+assert(current_os == "mbed")
 
 declare_args() {
   chip_build_libshell = false
@@ -36,3 +38,13 @@ group("mbed") {
 group("default") {
   deps = [ ":mbed" ]
 }
+
+mbedtls_target("mbedtls") {
+  include_dirs = [
+    "mbedtls"
+  ]
+
+  defines = [ 
+    "MBEDTLS_CONFIG_FILE=<mbed_tls_mbed_stub_config.h>"
+  ]
+}

config/mbed/chip-gn/args.gni

@@ -23,4 +23,12 @@ chip_system_project_config_include = ""
 chip_ble_project_config_include = ""
 
 custom_toolchain = "//toolchain:mbed"
-mbedtls_target = "//:dummy"
+mbedtls_target = "//:mbedtls"
+
+
+treat_warnings_as_errors = false
+chip_system_config_locking="none"
+chip_with_lwip=true
+chip_system_config_use_lwip=true
+chip_system_config_use_sockets=false
+chip_device_platform = "mbed"

config/mbed/chip-gn/toolchain/BUILD.gn

@@ -28,7 +28,7 @@ gcc_toolchain("mbed") {
   cxx = mbed_cxx
 
   toolchain_args = {
-    current_os = "mbed-os"
+    current_os = "mbed"
     is_clang = false
   }
 }