- Streamline device detection reporting to always use ->slot_name.

- Apply 64 bit sector size fixes to the overall code.

- Push ->handler down to the struct ata_channel.

- Introduce channel group based locking instead of a single global lock for all
   operations. There are still some places where we have preserved the ide_lock.
   We can't lock for queues during device probe and we protect global data
   structures during device registration and unregistration in ide.c with it.

- Start replacement of serialized access to the registers of
   channels which share them with proper host chip driver specific locking.
   This affects the following host chip drivers:

   cmd640.c, rz1000, ... ?

   Seems some are setting the serialize flag just in case. So better let's do it
   gradually over time.

   Well, I still have to think whatever we really need to put channels sharing
   an IRQ line in the same locking group.

   From now on the sick concept of a hw group is gone now. We have full blown
   per channel request queues! Hopefully I will be able soon to get my hands on
   a dual Athlon machine to check how this all behaves on a multi SMP machine.

- Move the whole SUPPORT_VLB_SYNC stuff to the only place where it is used: the
   pdc4030 host chip driver.  Eliminate it from the global driver part.

- Eliminate pseudo portability macros from pdc4030. This is a host chip firmly
   based on VLB.