[bsp/stm32]fix compile warning

Author: dongly

bsp/stm32/libraries/HAL_Drivers/drivers/drv_adc.c

@@ -341,7 +341,7 @@ static int stm32_adc_init(void)
     int result = RT_EOK;
     /* save adc name */
     char name_buf[5] = {'a', 'd', 'c', '0', 0};
-    int i = 0;
+    rt_uint32_t i = 0;
 
     for (i = 0; i < sizeof(adc_config) / sizeof(adc_config[0]); i++)
     {

bsp/stm32/libraries/HAL_Drivers/drivers/drv_flash/drv_flash_f4.c

@@ -388,6 +388,7 @@ const struct fal_flash_dev stm32_onchip_flash_16k =
         fal_flash_erase_16k,
     },
     8,
+    {},
 };
 const struct fal_flash_dev stm32_onchip_flash_64k =
 {
@@ -402,6 +403,7 @@ const struct fal_flash_dev stm32_onchip_flash_64k =
         fal_flash_erase_64k,
     },
     8,
+    {},
 };
 const struct fal_flash_dev stm32_onchip_flash_128k =
 {
@@ -416,6 +418,7 @@ const struct fal_flash_dev stm32_onchip_flash_128k =
         fal_flash_erase_128k,
     },
     8,
+    {},
 };
 
 static int fal_flash_read_16k(long offset, rt_uint8_t *buf, size_t size)

bsp/stm32/libraries/HAL_Drivers/drivers/drv_tim.c

@@ -858,7 +858,7 @@ void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
 
 static int stm32_hwtimer_init(void)
 {
-    int i = 0;
+    rt_uint32_t i = 0;
     int result = RT_EOK;
 
     for (i = 0; i < sizeof(stm32_hwtimer_obj) / sizeof(stm32_hwtimer_obj[0]); i++)

bsp/stm32/libraries/HAL_Drivers/drivers/drv_usart_v2.c

@@ -1315,7 +1315,7 @@ int rt_hw_usart_init(void)
     rt_size_t obj_num = sizeof(uart_obj) / sizeof(struct stm32_uart);
 
     stm32_uart_get_config();
-    for (int i = 0; i < obj_num; i++)
+    for (rt_uint32_t i = 0; i < obj_num; i++)
     {
         /* init UART object */
         uart_obj[i].config = &uart_config[i];