scsi: 3w-sas: Call scsi_done() directly

Conditional statements are faster than indirect calls. Hence call
scsi_done() directly.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Bart Van Assche <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/3w-sas.c

···
 
 			/* Now complete the io */
 			scsi_dma_unmap(cmd);
-			cmd->scsi_done(cmd);
+			scsi_done(cmd);
 			tw_dev->state[request_id] = TW_S_COMPLETED;
 			twl_free_request_id(tw_dev, request_id);
 			tw_dev->posted_request_count--;
···
 			if (cmd) {
 				cmd->result = (DID_RESET << 16);
 				scsi_dma_unmap(cmd);
-				cmd->scsi_done(cmd);
+				scsi_done(cmd);
 			}
 		}
 	}
···
 		retval = SCSI_MLQUEUE_HOST_BUSY;
 		goto out;
 	}
-
-	/* Save done function into scsi_cmnd struct */
-	SCpnt->scsi_done = done;
 
 	/* Get a free request id */
 	twl_get_request_id(tw_dev, &request_id);