NimBLE: Add optional mbedTLS support to NimBLE

- Additional menuconfig option to select either mbedTLS or Tinycrypt from NimBLE.
- Addition of `CMAC` and `ECP_RESTARTABLE` to mbedTLS menuconfig option and
  `esp_config.h`.
- Changes NimBLE `component.mk` and `CMakeLists.txt` to support mbedTLS option.
- Minor changes to `app_mesh.c` application.

examples/bluetooth/nimble/blemesh/main/app_mesh.c

@@ -32,7 +32,7 @@
 #include "mesh/mesh.h"
 
 static const char *tag = "NimBLE_MESH";
-void ble_store_ram_init(void);
+void ble_store_config_init(void);
 
 #define BT_DBG_ENABLED (MYNEWT_VAL(BLE_MESH_DEBUG))
 
@@ -418,6 +418,7 @@ void blemesh_host_task(void *param)
 
     health_pub_init();
     nimble_port_run();
+    nimble_port_freertos_deinit();
 }
 
 void app_main(void)
@@ -438,7 +439,7 @@ void app_main(void)
 
     bt_mesh_register_gatt();
     /* XXX Need to have template for store */
-    ble_store_ram_init();
+    ble_store_config_init();
 
     nimble_port_freertos_init(blemesh_host_task);
 }