[FL-2654] Updater: retrying pre-boot SD card mount multiple times (#1402)

* Updater: retrying pre-boot SD card mount multiple times
* Updater: added delay before retrying SD card mount on early boot

Co-authored-by: あく <alleteam@gmail.com>

firmware/targets/f7/fatfs/stm32_adafruit_sd.h

@@ -198,6 +198,7 @@ typedef struct {
 /** @defgroup STM32_ADAFRUIT_SD_Exported_Functions
   * @{
   */
+uint8_t BSP_SD_MaxMountRetryCount();
 uint8_t BSP_SD_Init(bool reset_card);
 uint8_t
     BSP_SD_ReadBlocks(uint32_t* pData, uint32_t ReadAddr, uint32_t NumOfBlocks, uint32_t Timeout);