interrupts before it calls configure(). On 3100s, this can result in
the ethernet interface interrupting before leprobe() is ever called.
Be a bit more defensive in leintr(), where it was dereferencing a null
pointer. This reputedly fixes the oft-reported problems of 3100s not
ooting unless they're on an idle net or had a hard reset done before boot.
(Reworking the config code completely would be nice too.)
state of the world as expected by the networking headers/mi code.
i changed one or two things in his patch slightly (do the lestart()
proto the right way, actually delete the if_output assignment line).
