netfilter: use IS_ENABLE to replace if defined in TRACE target

Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 5e12dca..147abf5 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -430,8 +430,7 @@
 	to->tc_index = from->tc_index;
 #endif
 	nf_copy(to, from);
-#if defined(CONFIG_NETFILTER_XT_TARGET_TRACE) || \
-    defined(CONFIG_NETFILTER_XT_TARGET_TRACE_MODULE)
+#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE)
 	to->nf_trace = from->nf_trace;
 #endif
 #if defined(CONFIG_IP_VS) || defined(CONFIG_IP_VS_MODULE)