Enable many STM devices with ARMC6

Yet another incorrect arm vs gcc discriminant

targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F437xG/device/nvic_addr.h

@@ -1,40 +0,0 @@
-/* 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

targets/TARGET_STM/nvic_addr.h

@@ -23,7 +23,7 @@ extern "C" {
 #if defined(__ICCARM__)
     #pragma section=".intvec"
     #define NVIC_FLASH_VECTOR_ADDRESS   ((uint32_t)__section_begin(".intvec"))
-#elif defined(__CC_ARM)
+#elif defined(__CC_ARM) || (defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050))
     extern uint32_t Load$$LR$$LR_IROM1$$Base[];
     #define NVIC_FLASH_VECTOR_ADDRESS   ((uint32_t)Load$$LR$$LR_IROM1$$Base)
 #elif defined(__GNUC__)