DISCO_L475VG_IOT01A: Update system init for cmsis5

Author: bcostm

targets/TARGET_STM/TARGET_STM32L4/TARGET_STM32L475xG/TARGET_DISCO_L475VG_IOT01A/system_stm32l4xx.c

@@ -83,7 +83,7 @@
   */
 
 #include "stm32l4xx.h"
-#include "hal_tick.h"
+#include "nvic_addr.h"
 
 #if !defined  (HSE_VALUE)
   #define HSE_VALUE    ((uint32_t)8000000) /*!< Value of the External oscillator in Hz */
@@ -215,20 +215,9 @@ void SystemInit(void)
 #ifdef VECT_TAB_SRAM
   SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
 #else
-  SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
+  SCB->VTOR = NVIC_FLASH_VECTOR_ADDRESS; /* Vector Table Relocation in Internal FLASH */
 #endif
 
-  /* Configure the Cube driver */
-  SystemCoreClock = MSI_VALUE; // At this stage the MSI is used as system clock
-  HAL_Init();
-
-  /* Configure the System clock source, PLL Multiplier and Divider factors,
-     AHB/APBx prescalers and Flash settings */
-  SetSysClock();
-  
-  /* Reset the timer to avoid issues after the RAM initialization */
-  TIM_MST_RESET_ON;
-  TIM_MST_RESET_OFF;
 }
 
 /**