scsi: aha1740: stop using scsi_unregister

aha1740 doesn't use scsi_register, so it should not use scsi_unregister
either.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/aha1740.c

@@ -592,7 +592,7 @@ static int aha1740_probe (struct device *dev)
 					     DMA_BIDIRECTIONAL);
 	if (!host->ecb_dma_addr) {
 		printk (KERN_ERR "aha1740_probe: Couldn't map ECB, giving up\n");
-		scsi_unregister (shpnt);
+		scsi_host_put (shpnt);
 		goto err_host_put;
 	}