fixup time_t in rtc driver

bsp/imx6ull-artpi-smart/drivers/drv_rtc.c

@@ -89,16 +89,16 @@ static rt_err_t _rtc_ops_control( rt_device_t dev, int cmd, void *args )
     switch (cmd)
     {
         case RT_DEVICE_CTRL_RTC_GET_TIME:
-            *(rt_uint32_t *)args = _get_rtc_timestamp();
-            LOG_D("RTC: get rtc_time %x", *(rt_uint32_t *)args);
+            *(time_t *)args = _get_rtc_timestamp();
+            LOG_D("RTC: get rtc_time %x", *(time_t *)args);
             break;
 
         case RT_DEVICE_CTRL_RTC_SET_TIME:
-            if (_set_rtc_time_stamp(*(rt_uint32_t *)args))
+            if (_set_rtc_time_stamp(*(time_t *)args))
             {
                 result = -RT_ERROR;
             }
-            LOG_D("RTC: set rtc_time %x", *(rt_uint32_t *)args);
+            LOG_D("RTC: set rtc_time %x", *(time_t *)args);
             break;
     }