libata-scsi: Fixup ata_gen_passthru_sense()

There's a typo in ata_gen_passthru_sense(), where the first byte
would be overwritten incorrectly later on.

Reported-by: Charles Machalow <csm10495@gmail.com>
Signed-off-by: Hannes Reinecke <hare@suse.com>
Fixes: 11093cb ("libata-scsi: generate correct ATA pass-through sense")
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Tejun Heo <tj@kernel.org>

Author: hreinecke

drivers/ata/libata-scsi.c

@@ -1088,7 +1088,7 @@ static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
 		desc[1] = tf->command; /* status */
 		desc[2] = tf->device;
 		desc[3] = tf->nsect;
-		desc[0] = 0;
+		desc[7] = 0;
 		if (tf->flags & ATA_TFLAG_LBA48)  {
 			desc[8] |= 0x80;
 			if (tf->hob_nsect)