iwlwifi: put use_rts_for_aggregation into hw_params

The hardware config ht_params shouldn't be modified,
so copy the use_rts_for_aggregation parameter into
hw_params and use/modify it there.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-shared.h b/drivers/net/wireless/iwlwifi/iwl-shared.h
index ab2e1f7..7c95027 100644
--- a/drivers/net/wireless/iwlwifi/iwl-shared.h
+++ b/drivers/net/wireless/iwlwifi/iwl-shared.h
@@ -174,6 +174,7 @@
  *	relevant for 1000, 6000 and up
  * @wd_timeout: TX queues watchdog timeout
  * @struct iwl_sensitivity_ranges: range of sensitivity values
+ * @use_rts_for_aggregation: use rts/cts protection for HT traffic
  */
 struct iwl_hw_params {
 	u8  max_txq_num;
@@ -183,6 +184,7 @@
 	u8  valid_tx_ant;
 	u8  valid_rx_ant;
 	u8  ht40_channel;
+	bool use_rts_for_aggregation;
 	u16 sku;
 	u32 rx_page_order;
 	u32 ct_kill_threshold;