target: Use scsi helpers to build the sense data correctly

Instead of open coding the sense buffer construction, use
scsi scsi_build_sense_buffer() and scsi_set_sense_information()
helpers which moved to scsi_common.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>