scsi: target: Rename target_setup_cmd_from_cdb() to target_cmd_parse_cdb()

This commit also removes the unused argument, cdb, that was passed to this
function.

Link: https://lore.kernel.org/r/1591559913-8388-5-git-send-email-sudhakar.panneerselvam@oracle.com


Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Sudhakar Panneerselvam <sudhakar.panneerselvam@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>