timer in xl_txeof()/xl_txeof_90xB(); xl_poll_locked() unconditionally invokes xl_txeof()/xl_txeof_90xB(), effectively circumventing that the watchdog ever fires in the DEVICE_POLLING case as its timer is constantly reloaded. - Remove the banal and pedantically outdated comment regarding setting xl_wdog_timer to 0 in xl_txeof(). Pointed out by: bde