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/mac80211/ieee80211_iface.c b/net/mac80211/ieee80211_iface.c
index 0d6824b..6777050 100644
--- a/net/mac80211/ieee80211_iface.c
+++ b/net/mac80211/ieee80211_iface.c
@@ -165,7 +165,7 @@
 		break;
 	default:
 		printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x",
-		       dev->name, __FUNCTION__, type);
+		       dev->name, __func__, type);
 	}
 	ieee80211_debugfs_change_if_type(sdata, oldtype);
 }