o Minor tweaks to the AX88x90 probe routine, mostly related to comments.

o Minor tweaks to the AX88x90 probe routine, mostly related to comments.
o Don't run through the register initialization in the read mac routine
  for the AX88x90.  It duplicates other stuff that we do.
o Eliminate the 10ms delay after we reset the AX88x90.  We already wait for
  the appropriate bits to indicate reset is done.