[NET]: Make NETDEBUG pure printk wrappers

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 5088f90..44607f4 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -904,7 +904,7 @@
 	case IGMP_MTRACE_RESP:
 		break;
 	default:
-		NETDEBUG(printk(KERN_DEBUG "New IGMP type=%d, why we do not know about it?\n", ih->type));
+		NETDEBUG(KERN_DEBUG "New IGMP type=%d, why we do not know about it?\n", ih->type);
 	}
 	in_dev_put(in_dev);
 	kfree_skb(skb);