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/8021q/vlanproc.c b/net/8021q/vlanproc.c
index 146cfb0..3b8657a 100644
--- a/net/8021q/vlanproc.c
+++ b/net/8021q/vlanproc.c
@@ -168,7 +168,7 @@
 	return 0;
 
 err:
-	pr_err("%s: can't create entry in proc filesystem!\n", __FUNCTION__);
+	pr_err("%s: can't create entry in proc filesystem!\n", __func__);
 	vlan_proc_cleanup();
 	return -ENOBUFS;
 }