netfilter: nfnetlink_log: Make use of pr_fmt where applicable

Signed-off-by: Marcelo Ricardo Leitner <mleitner@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nfnetlink_log.c

@@ -12,6 +12,9 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/module.h>
 #include <linux/skbuff.h>
 #include <linux/if_arp.h>
@@ -1063,19 +1066,19 @@ static int __init nfnetlink_log_init(void)
 	netlink_register_notifier(&nfulnl_rtnl_notifier);
 	status = nfnetlink_subsys_register(&nfulnl_subsys);
 	if (status < 0) {
-		pr_err("log: failed to create netlink socket\n");
+		pr_err("failed to create netlink socket\n");
 		goto cleanup_netlink_notifier;
 	}
 
 	status = nf_log_register(NFPROTO_UNSPEC, &nfulnl_logger);
 	if (status < 0) {
-		pr_err("log: failed to register logger\n");
+		pr_err("failed to register logger\n");
 		goto cleanup_subsys;
 	}
 
 	status = register_pernet_subsys(&nfnl_log_net_ops);
 	if (status < 0) {
-		pr_err("log: failed to register pernet ops\n");
+		pr_err("failed to register pernet ops\n");
 		goto cleanup_logger;
 	}
 	return status;