s390/dasd: Fix typo in comment

Fix typo in comment:
requeust->request,
Removve->Remove,
notthing->nothing.

Signed-off-by: Yu Jiaoliang <[e-mail]>
Signed-off-by: Stefan Haberland <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jens Axboe <[e-mail]>

drivers/s390/block/dasd.c

···
 		case DASD_CQR_IN_IO:
 			rc = device->discipline->term_IO(cqr);
 			if (rc) {
-				/* unable to terminate requeust */
+				/* unable to terminate request */
 				dev_err(&device->cdev->dev,
 					"Flushing the DASD request queue failed\n");
 				/* stop flush processing */

drivers/s390/block/dasd_devmap.c

···
 	dev_set_drvdata(&device->cdev->dev, NULL);
 	spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
 
-	/* Removve copy relation */
+	/* Remove copy relation */
 	dasd_devmap_delete_copy_relation_device(device);
 	/*
 	 * Drop ref_count by 3, one for the devmap reference, one for

drivers/s390/block/dasd_eckd.c

···
 	}
 
 	if (count_area != NULL && count_area->kl == 0) {
-		/* we found notthing violating our disk layout */
+		/* we found nothing violating our disk layout */
 		if (dasd_check_blocksize(count_area->dl) == 0)
 			block->bp_block = count_area->dl;
 	}