mac80211: make bridge_packets a virtual interface option

The bridge_packets configuration really should be per virtual
interface (theoretically per AP/VLAN, but this is much easier);
there currently is no way to set it yet though. Also invert
the option to "NO_BRIDGE_PACKETS" so the default is to bridge.

While at it, also document the flags properly.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 208563a..93f2cda 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1221,8 +1221,9 @@
 	skb = rx->skb;
 	xmit_skb = NULL;
 
-	if (local->bridge_packets && (sdata->vif.type == IEEE80211_IF_TYPE_AP ||
-				      sdata->vif.type == IEEE80211_IF_TYPE_VLAN) &&
+	if ((sdata->vif.type == IEEE80211_IF_TYPE_AP ||
+	     sdata->vif.type == IEEE80211_IF_TYPE_VLAN) &&
+	    !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) &&
 	    (rx->flags & IEEE80211_RX_RA_MATCH)) {
 		if (is_multicast_ether_addr(ehdr->h_dest)) {
 			/*