802.3u autonegotiation, and will report the precise media selected
by autonegotiation by reading PHY-specific registers.
XXX There is still some work to do wrt. autonegotiation and the
BNC/AUI support in the ThunderLAN PHY.
adapters, and provide media-selections and status to the parent.
This includes drivers for the Thunderland integrated PHY, and
National Semiconductor's DP83840A.
Note: The interface betweeen network controller and mii is not complete yet,
and will need some minors tweaks to support media auto-selection.