[SCSI] sym53c8xx: fix NULL deref on error path

If sym_attach() fails to allocate np, the error path will dereference
a NULL pointer for printk.
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/sym53c8xx_2/sym_glue.c

@@ -1418,7 +1418,7 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
  attach_failed:
 	if (!shost)
 		return NULL;
-	printf_info("%s: giving up ...\n", sym_name(np));
+	printf_info("sym%d: giving up ...\n", unit);
 	if (np)
 		sym_free_resources(np, pdev);
 	scsi_host_put(shost);