[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/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index c206a15..413a4eb 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -648,7 +648,7 @@
 	return 0;
 }
 
-static struct seq_operations ip6fl_seq_ops = {
+static const struct seq_operations ip6fl_seq_ops = {
 	.start	=	ip6fl_seq_start,
 	.next	=	ip6fl_seq_next,
 	.stop	=	ip6fl_seq_stop,