scsi: isci: Fix typo in comment

Spelling mistake (triple letters) in comment.  Detected with the help of
Coccinelle.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Julia Lawall <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: JuliaLawall

drivers/scsi/isci/request.c

@@ -2182,7 +2182,7 @@ static enum sci_status atapi_data_tc_completion_handler(struct isci_request *ire
 	case (SCU_TASK_DONE_UNEXP_FIS << SCU_COMPLETION_TL_STATUS_SHIFT): {
 		u16 len = sci_req_tx_bytes(ireq);
 
-		/* likely non-error data underrrun, workaround missing
+		/* likely non-error data underrun, workaround missing
 		 * d2h frame from the controller
 		 */
 		if (d2h->fis_type != FIS_REGD2H) {