DISCO_L475VG_IOT01A: Add missing nvic_addr.h file

targets/TARGET_STM/TARGET_STM32L4/TARGET_STM32L475xG/device/nvic_addr.h

@@ -0,0 +1,40 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2017-2017 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.
+ */
+#ifndef NVIC_ADDR_H
+#define NVIC_ADDR_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(__ICCARM__)
+    #pragma section=".intvec"
+    #define NVIC_FLASH_VECTOR_ADDRESS   ((uint32_t)__section_begin(".intvec"))
+#elif defined(__CC_ARM)
+    extern uint32_t Load$$LR$$LR_IROM1$$Base[];
+    #define NVIC_FLASH_VECTOR_ADDRESS   ((uint32_t)Load$$LR$$LR_IROM1$$Base)
+#elif defined(__GNUC__)
+    extern uint32_t g_pfnVectors[];
+    #define NVIC_FLASH_VECTOR_ADDRESS   ((uint32_t)g_pfnVectors)
+#else
+    #error "Flash vector address not set for this toolchain"
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif