一进入mcu_enter_deepsleep就需要清除_sleep_second_time_now

Signed-off-by: huhui <huhui@sharkgulf.com>

Application/bsp/mcu_power_sleep.c

@@ -120,16 +120,16 @@ static void post_deepsleep(void){
 }
 
 void mcu_enter_deepsleep(void){
+	_sleep_second_time_now = 0;
 	if (pre_deepsleep()< 0){
 		return;
-	} 
+	}
+	_wakeup_source = 0;
 	if (enable_wakeup_irq()< 0){
 		disable_wakeup_irq();
 		post_deepsleep();
 		return;
 	}
-	_sleep_second_time_now = 0;
-	_wakeup_source = 0;
 	do {
 		u32 start_time = shark_rtc_get_second();
 		pmu_to_deepsleepmode(PMU_LDO_LOWPOWER, WFI_CMD);