netfilter: cleanup printk messages

Make sure all printk messages have a severity level.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c
index b68ff15..c6049c2 100644
--- a/net/netfilter/nf_conntrack_proto_sctp.c
+++ b/net/netfilter/nf_conntrack_proto_sctp.c
@@ -717,12 +717,12 @@
 
 	ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_sctp4);
 	if (ret) {
-		printk("nf_conntrack_l4proto_sctp4: protocol register failed\n");
+		pr_err("nf_conntrack_l4proto_sctp4: protocol register failed\n");
 		goto out;
 	}
 	ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_sctp6);
 	if (ret) {
-		printk("nf_conntrack_l4proto_sctp6: protocol register failed\n");
+		pr_err("nf_conntrack_l4proto_sctp6: protocol register failed\n");
 		goto cleanup_sctp4;
 	}