- typedef unsigned char byte; is finally gone. Everything using it should
   be just ported to u8 if I missed some place where it still gets used.

- Next round of parameter parsing cleanups by Gerald Champagne.
   Adjusted a bit to harmonize with  hd.c.

- Move IDE register bitfields declarations over from hdparm.h to
   ide.h.

- Fixup cmd640 fix by LT.

- Don't manipulate REQ_QUEUED in blk_insert_special() as discussed on
   lkml. The single only affected file is ll_rw_blk.c of course.

- Declare constants needed by hd.c directly there. Those are standard
   values not subject to change and we prefer a bit of code duplication
   in favour of making the two drivers independant from each other.

- Move everything not ioctl related away from hdreg.h to ide.h.
   This header is in effect not private to the ATA code and should
   therefore not contain stuff only usefull there.