s390/dasd: Fix typo in comment

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

Signed-off-by: Yu Jiaoliang <yujiaoliang@vivo.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://lore.kernel.org/r/20241108133913.3068782-3-sth@linux.ibm.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>