[NET]: Make all initialized struct seq_operations const.

Make all initialized struct seq_operations in net/ const

Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/nf_conntrack_expect.c b/net/netfilter/nf_conntrack_expect.c
index 513828f..2191fe0 100644
--- a/net/netfilter/nf_conntrack_expect.c
+++ b/net/netfilter/nf_conntrack_expect.c
@@ -464,7 +464,7 @@
 	return seq_putc(s, '\n');
 }
 
-static struct seq_operations exp_seq_ops = {
+static const struct seq_operations exp_seq_ops = {
 	.start = exp_seq_start,
 	.next = exp_seq_next,
 	.stop = exp_seq_stop,