rename si5351 driver, remove external files

Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc.c

@@ -2666,7 +2666,7 @@ uint8_t RTC_ByteToBcd2(uint8_t Value)
   while (temp >= 10U)
   {
     bcdhigh++;
-    temp -= 10U;
+    temp -= 10;
   }
 
   return ((uint8_t)(bcdhigh << 4U) | temp);