ieee1394: constify device ID tables

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/ieee1394/eth1394.c b/drivers/ieee1394/eth1394.c
index 0ed0f80..4ca1035 100644
--- a/drivers/ieee1394/eth1394.c
+++ b/drivers/ieee1394/eth1394.c
@@ -438,7 +438,7 @@
 	return eth1394_new_node(hi, ud);
 }
 
-static struct ieee1394_device_id eth1394_id_table[] = {
+static const struct ieee1394_device_id eth1394_id_table[] = {
 	{
 		.match_flags = (IEEE1394_MATCH_SPECIFIER_ID |
 				IEEE1394_MATCH_VERSION),