mac80211_hwsim: claim active monitor support

It seems to actually work this way already, so we
may need to do some work to make monitor interfaces
be _not_ active in hwsim instead.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/mac80211_hwsim.c

@@ -2311,6 +2311,7 @@ static int __init init_mac80211_hwsim(void)
 		hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
 				    WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
 				    WIPHY_FLAG_AP_UAPSD;
+		hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR;
 
 		/* ask mac80211 to reserve space for magic */
 		hw->vif_data_size = sizeof(struct hwsim_vif_priv);