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/unix/af_unix.c b/net/unix/af_unix.c
index b8788fd..ae58435 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -2176,7 +2176,7 @@
 	rc = proto_register(&unix_proto, 1);
 	if (rc != 0) {
 		printk(KERN_CRIT "%s: Cannot create unix_sock SLAB cache!\n",
-		       __FUNCTION__);
+		       __func__);
 		goto out;
 	}