before enter sleep clear wakeup source

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

Application/bsp/mcu_power_sleep.c

@@ -61,6 +61,7 @@ static void wait_dcdc_good(void) {
 }
 static int pre_deepsleep(void){
 	LED_ALL_ON(0);
+	_wakeup_source = 0;
 	systick_close();
 	shark_rtc_set_backup(0xF0);
 	shark_uart_deinit(SHARK_UART0);