iwlwifi: use ieee80211_free_txskb

To let mac80211 clean up any TX information when
a frame is dropped, use ieee80211_free_txskb().
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/iwlwifi/dvm/mac80211.c

@@ -521,7 +521,7 @@ static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 		     ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 
 	if (iwlagn_tx_skb(priv, control->sta, skb))
-		dev_kfree_skb_any(skb);
+		ieee80211_free_txskb(hw, skb);
 }
 
 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,

drivers/net/wireless/iwlwifi/dvm/main.c

@@ -2114,7 +2114,7 @@ static void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 
 	info = IEEE80211_SKB_CB(skb);
 	iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
-	dev_kfree_skb_any(skb);
+	ieee80211_free_txskb(priv->hw, skb);
 }
 
 static void iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)