Cancel reset if modem is back before reset sequence is started. When upgrading the modem through fwupd, it will enter fastboot. Therefore, it disappears from the USB bus for a few ms. However, the eg25-manager considers this as an issue and resets the modem a bit later during the upgrade process. To avoid this, cancel the reset sequence if the modem is already back before the reset sequence is started. This will take less than 3 seconds.