support RHF0M0E5 board with armcc v6

1. project, see TencentOS-tiny\board\RHF0M0E5_STM32WLE5xx\KEIL\hello_world

board/RHF0M0E5_STM32WLE5xx/BSP/Inc/mcu_init.h

@@ -0,0 +1,19 @@
+#ifndef __MCU_INIT_H
+#define __MCU_INIT_H
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#include "main.h"
+#include "usart.h"
+#include "gpio.h"
+#include "tos_k.h"
+#include "stdio.h"
+
+void board_init(void);
+void SystemClock_Config(void);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /*__ __MCU_INIT_H */