Convert the ThunderLAN driver to miibus. This took me a while because I

had to get the ML 6692 PHY driver working correctly, which is harder than
it sounds. "Bitrate" ThunderLAN devices should still be supported (i.e
the older 10Mbps Netflex 3/P, which use the TNETE110 chip that has no
MII support). The ThunderLAN has an internal PHY which makes things a
little complicated, but these are the basic rules:

- For devices with just the ThunderLAN, the internal PHY is used to
  provide 10baseT, and 10base5/10baseT support. Autonegotiation will
  work, but only with 10baseT links. The only thing that really gets
  negotiated is whether the link is full or half duplex.

- For devices with the ThunderLAN and an external 10/100 PHY (like the
  Compaq Netelligent 100Mbps cards, or the internal Netflex 3/P with
  100Mbps upgrade daughter card), the external PHY is used for 10baseT
  and 100baseTX modes. The internal PHY is still used to support
  10base5/10base2, though you have to select them manual with ifconfig.

- For devices with the ThunderLAN and the ML6692 PHY, both the internal
  and external PHYs are used, though it will appear as though the 6692
  PHY will be used to support 10baseT and 100baseTX modes. In reality,
  the internal PHY will be used for 10baseT, but this fact will be hidden
  from the user. The 10base5/10base2 modes can also be selected manually
  as with above.

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