iwlagn: turn dynamic smps on while BT is on

While BT is on and doing iscan and/or pscan, BT is in listen
mode which will impact WiFi throughput, we need to
enable dynamic smps in order to improve the rx throughput.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-agn-lib.c

@@ -1897,7 +1897,10 @@ static void iwlagn_bt_traffic_change_work(struct work_struct *work)
 
 	switch (priv->bt_traffic_load) {
 	case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
-		smps_request = IEEE80211_SMPS_AUTOMATIC;
+		if (priv->bt_status)
+			smps_request = IEEE80211_SMPS_DYNAMIC;
+		else
+			smps_request = IEEE80211_SMPS_AUTOMATIC;
 		break;
 	case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
 		smps_request = IEEE80211_SMPS_DYNAMIC;