[SCSI] ibmvscsi: Abort path fix

Since it is completely possible for scsi core to call
a LLDD's eh_abort function after the command has completed,
fix ibmvscsi to return SUCCESS if this is the case.
Signed-off-by: NBrian King <brking@linux.vnet.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/ibmvscsi/ibmvscsi.c

@@ -1018,7 +1018,7 @@ static int ibmvscsi_eh_abort_handler(struct scsi_cmnd *cmd)
 
 	if (!found_evt) {
 		spin_unlock_irqrestore(hostdata->host->host_lock, flags);
-		return FAILED;
+		return SUCCESS;
 	}
 
 	evt = get_event_struct(&hostdata->pool);