iwlwifi: add bt_init_traffic_load as configurable parameter

Adding configurable parameter in .cfg for the initial Bluetooth traffic
load; set it to IWL_BT_COEX_TRAFFIC_LOAD_NONE for now, but can be change
for debugging or other reason.

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-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 146d0d5..d5dacaf 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -279,6 +279,7 @@
  *	chain noise calibration operation
  * @scan_antennas: available antenna for scan operation
  * @advanced_bt_coexist: support advanced bt coexist
+ * @bt_init_traffic_load: specify initial bt traffic load
  * @need_dc_calib: need to perform init dc calibration
  * @bt_statistics: use BT version of statistics notification
  * @agg_time_limit: maximum number of uSec in aggregation
@@ -353,6 +354,7 @@
 	u8 scan_rx_antennas[IEEE80211_NUM_BANDS];
 	u8 scan_tx_antennas[IEEE80211_NUM_BANDS];
 	bool advanced_bt_coexist;
+	u8 bt_init_traffic_load;
 	const bool need_dc_calib;
 	const bool bt_statistics;
 	u16 agg_time_limit;