mac80211: allow userspace registration for probe requests in IBSS

This change allows userspace to register for probe request
frames on an IBSS interface. Userspace then has to handle
them and send replies.

Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index c4ed83b..4ece42c 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -474,7 +474,8 @@
 		.tx = 0xffff,
 		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 			BIT(IEEE80211_STYPE_AUTH >> 4) |
-			BIT(IEEE80211_STYPE_DEAUTH >> 4),
+			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
+			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 	},
 	[NL80211_IFTYPE_STATION] = {
 		.tx = 0xffff,