Setup handler and output first data block directly from ->prehandler()
instead of calling ->handler().  The only change in functionality is that
we no longer check DRIVE_READY status bits (there is no need to do it).
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>