Import Mbed OS hard-float snapshot

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/itm_api.c

@@ -0,0 +1,28 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2017 ARM Limited
+ *
+ * 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.
+ */
+
+#if DEVICE_ITM
+
+#include "hal/itm_api.h"
+
+void itm_init(void)
+{
+    /**
+     * Initialization moved to system_nrf52840.c due to SoftDevice incompatibility.
+     */
+}
+
+#endif