ipv4: clean the init_ipv4_mibs error paths

After moving all the stuff outside this function it looks
a bit ugly - make it look better.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 36ff6dc..dd919d8 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1399,13 +1399,7 @@
 
 static int __init init_ipv4_mibs(void)
 {
-	if (register_pernet_subsys(&ipv4_mib_ops))
-		goto err_net;
-
-	return 0;
-
-err_net:
-	return -ENOMEM;
+	return register_pernet_subsys(&ipv4_mib_ops);
 }
 
 static int ipv4_proc_init(void);