iwlwifi: move iwl_free_tfds_in_queue to iwlagn

This function is only used by the agn drivers,
so doesn't have to be in core and exported.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.h b/drivers/net/wireless/iwlwifi/iwl-agn.h
index 2d74805..fbbefe1 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.h
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.h
@@ -93,6 +93,8 @@
 int iwlagn_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
 			   u16 ssn_idx, u8 tx_fifo);
 void iwlagn_txq_set_sched(struct iwl_priv *priv, u32 mask);
+void iwl_free_tfds_in_queue(struct iwl_priv *priv,
+			    int sta_id, int tid, int freed);
 
 /* uCode */
 int iwlagn_load_ucode(struct iwl_priv *priv);