- Add stge(4) for Sundance/Tamarack TC9021 Gigabit Ethernet chip.

- Add stge(4) for Sundance/Tamarack TC9021 Gigabit Ethernet chip.
  It supports following cards:
    o  Antares Microsystems Gigabit Ethernet
    o  ASUS NX1101 Gigabit Ethernet
    o  D-Link DGE-550T Gigabit Ethernet
    o  IC Plus IP1000A Gigabit Ethernet
    o  Sundance ST-2021 Gigabit Ethernet
    o  Sundance ST-2023 Gigabit Ethernet
    o  Sundance TC9021 Gigabit Ethernet
    o  Tamarack TC9021 Gigabit Ethernet
- Add PHY module for IC Plus IP1000A integrated PHY, which may be used
  by some on-board stge(4)
- Hook stge(4) into GENERIC and LINT

Obtained-from: FreeBSD (yongari@freebsd.org)