[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/sunrpc/cache.c b/net/sunrpc/cache.c
index 543b085..01c3c41 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -1210,7 +1210,7 @@
 	return cd->cache_show(m, cd, cp);
 }
 
-static struct seq_operations cache_content_op = {
+static const struct seq_operations cache_content_op = {
 	.start	= c_start,
 	.next	= c_next,
 	.stop	= c_stop,