[SCSI] zfcp: Remove some sparse warnings

Remove some sparse warnings by telling sparse that zfcp_req_create
acquires the lock for the request queue.
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/s390/scsi/zfcp_ext.h

@@ -94,7 +94,8 @@ extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *);
 extern int  zfcp_fsf_status_read(struct zfcp_adapter *, int);
 extern int zfcp_status_read_refill(struct zfcp_adapter *adapter);
 extern int zfcp_fsf_req_create(struct zfcp_adapter *, u32, int, mempool_t *,
-			       unsigned long *, struct zfcp_fsf_req **);
+			       unsigned long *, struct zfcp_fsf_req **)
+	__acquires(adapter->request_queue.queue_lock);
 extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *,
 			    struct zfcp_erp_action *);
 extern int zfcp_fsf_send_els(struct zfcp_send_els *);