[PATCH] libata: improve SCSI sense data generation

Update ata_gen_ata_sense() to use desc format sense data to report the
first failed block.  The first failed block is read from result_tf
using ata_tf_read_block() which can handle all three address formats.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>