• Use bus_foo() rather than bus_space_foo() and retire the bus tag and handle from the softc.
• Rework the watchdog timer to match other NIC drivers:
  • Start a timer in fe_init() that runs once a second and checks a counter in the softc that is identical to the deprecated 'if_timer'.
  • Just adjust the softc tx timeout value when sending packets instead of scheduling the timer.
• Use IFQ_SET_MAXLEN().

Tested by: WATANABE Kazuhiro