net: constify VFTs

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/ath5k/debug.c b/drivers/net/wireless/ath5k/debug.c
index ccaeb5c..d281b6e 100644
--- a/drivers/net/wireless/ath5k/debug.c
+++ b/drivers/net/wireless/ath5k/debug.c
@@ -165,7 +165,7 @@
 	return 0;
 }
 
-static struct seq_operations register_seq_ops = {
+static const struct seq_operations register_seq_ops = {
 	.start = reg_start,
 	.next  = reg_next,
 	.stop  = reg_stop,