cfg80211: add flags to cfg80211_rx_mgmt()

Add flags intended to report various auxiliary information
and introduce the NL80211_RXMGMT_FLAG_ANSWERED flag to report
that the frame was already answered by the device.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
[REPLIED->ANSWERED, reword commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index ffad155..0790105 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2678,8 +2678,7 @@
 		sig = status->signal;
 
 	if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig,
-			     rx->skb->data, rx->skb->len,
-			     GFP_ATOMIC)) {
+			     rx->skb->data, rx->skb->len, 0, GFP_ATOMIC)) {
 		if (rx->sta)
 			rx->sta->rx_packets++;
 		dev_kfree_skb(rx->skb);