aic94xx: set an error code on failure

We recently did some cleanup here and now the static checkers notice
that there is a missing error code when ioremap() fails.  Let's set it
to -ENOMEM.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NJames Bottomley <JBottomley@Odin.com>

drivers/scsi/aic94xx/aic94xx_init.c

@@ -109,6 +109,7 @@ static int asd_map_memio(struct asd_ha_struct *asd_ha)
 		if (!io_handle->addr) {
 			asd_printk("couldn't map MBAR%d of %s\n", i==0?0:1,
 				   pci_name(asd_ha->pcidev));
+			err = -ENOMEM;
 			goto Err_unreq;
 		}
 	}