net: replace remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/netfilter/ip6t_REJECT.c b/net/ipv6/netfilter/ip6t_REJECT.c
index 831708a..baf8290 100644
--- a/net/ipv6/netfilter/ip6t_REJECT.c
+++ b/net/ipv6/netfilter/ip6t_REJECT.c
@@ -177,7 +177,7 @@
 {
 	const struct ip6t_reject_info *reject = targinfo;
 
-	pr_debug("%s: medium point\n", __FUNCTION__);
+	pr_debug("%s: medium point\n", __func__);
 	/* WARNING: This code causes reentry within ip6tables.
 	   This means that the ip6tables jump stack is now crap.  We
 	   must return an absolute verdict. --RR */