[NET_SCHED]: Use typeful attribute construction helpers

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index e33e43a..41fbd49 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -133,7 +133,7 @@
 			p = s_p;
 		}
 	}
-	NLA_PUT(skb, TCA_FCNT, 4, &n_i);
+	NLA_PUT_U32(skb, TCA_FCNT, n_i);
 	nla_nest_end(skb, nest);
 
 	return n_i;