scsi: zfcp: Remove unneeded INIT_LIST_HEAD() for FSF requests

INIT_LIST_HEAD() is only needed for actual list heads, while req->list is
used as a list entry.

Note that when the error path in zfcp_fsf_req_send() removes the request
from the adapter's list of pending requests, it actually looks up the
request from the zfcp_reqlist - rather than just calling list_del().  So
there's no risk of us calling list_del() on a request that hasn't been
added to any list yet.

Link: https://lore.kernel.org/r/254dc0ae28dccc43ab0b1079ef2c8dcb5fe1d2e4.1618417667.git.bblock@linux.ibm.comReviewed-by: NBenjamin Block <bblock@linux.ibm.com>
Reviewed-by: NSteffen Maier <maier@linux.ibm.com>
Signed-off-by: NJulian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: NBenjamin Block <bblock@linux.ibm.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/s390/scsi/zfcp_fsf.c

@@ -846,7 +846,6 @@ static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 	if (adapter->req_no == 0)
 		adapter->req_no++;
 
-	INIT_LIST_HEAD(&req->list);
 	timer_setup(&req->timer, NULL, 0);
 	init_completion(&req->completion);