[SCSI] isci: fix breakage caused by >16byte CDB patch

Oops, apparently no-one I cc'd at intel actually bothered to check this
patch for the isci driver:

commit e73823f7a2c921dcf068d34ea03bd682498d9e42
Author: James Bottomley <[e-mail]>
Date: Tue May 7 15:38:18 2013 -0700

[SCSI] libsas: implement > 16 byte CDB support

sci_swab32_cpy needs multiples of four, so for commands that aren't that, it's
rounding the wrong way. fix by doing (len+3)/4 instead of len/4.

Reported-by: Tony Luck <[e-mail]>
Tested-by: Tony Luck <[e-mail]>
Signed-off-by: James Bottomley <[e-mail]>

drivers/scsi/isci/request.c

···
 	cmd_iu->_r_c = 0;
 
 	sci_swab32_cpy(&cmd_iu->cdb, task->ssp_task.cmd->cmnd,
-		       task->ssp_task.cmd->cmd_len / sizeof(u32));
+		       (task->ssp_task.cmd->cmd_len+3) / sizeof(u32));
 }
 
 static void sci_task_request_build_ssp_task_iu(struct isci_request *ireq)