mac80211: fix P2P-Device management frame RX

There's an issue in receiving broadcast management frames
on P2P Device virtual interfaces, such frames have the RX
flag IEEE80211_RX_RA_MATCH cleared and are thus dropped
in ieee80211_rx_h_mgmt_check(). They should be let through
to make it to ieee80211_rx_h_userspace_mgmt() and then to
userspace.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/rx.c

@@ -3043,7 +3043,8 @@ static int prepare_for_handlers(struct ieee80211_rx_data *rx,
 		    !ieee80211_is_probe_resp(hdr->frame_control) &&
 		    !ieee80211_is_beacon(hdr->frame_control))
 			return 0;
-		if (!ether_addr_equal(sdata->vif.addr, hdr->addr1))
+		if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) &&
+		    !multicast)
 			status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
 		break;
 	default: