Misc cleanup and probe rework:

Misc cleanup and probe rework:

	o Use the board id command to find out what kind of board
	  we're talking to.  If we're talking to a board that is has
	  an ID that is shared between boards supported by the aha
	  driver and the bt driver, then use the bt's geometry
	  register to weed out the bt cards.  Otherwise assume that we
	  support this card.
	o Remove bt esetup command sending to the card.  It seems to
	  wedge too many cards.
	o Revert to doing a soft reset after an invalid command.  This
	  change didn't fix anything, so I'm backing it out.  The
	  whole issue of card resetting needs to be revisisted at some
	  point so that we can do it properly on all hardware.
	o GC unused stuff in some places.