iwlwifi: implement txq invalidate byte count table

This is required to overcome a bug in 5000 HW byte count table.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 8264b4e..1941a91 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -107,10 +107,12 @@
 	void (*txq_update_byte_cnt_tbl)(struct iwl_priv *priv,
 					struct iwl_tx_queue *txq,
 					u16 byte_cnt);
+	void (*txq_inval_byte_cnt_tbl)(struct iwl_priv *priv,
+				       struct iwl_tx_queue *txq);
+	void (*txq_set_sched)(struct iwl_priv *priv, u32 mask);
 	/* setup Rx handler */
 	void (*rx_handler_setup)(struct iwl_priv *priv);
 	/* nic Tx fifo handling */
-	void (*txq_set_sched)(struct iwl_priv *priv, u32 mask);
 	/* alive notification after init uCode load */
 	void (*init_alive_start)(struct iwl_priv *priv);
 	/* alive notification */