iwlwifi: send reduce tx power info in command

Add the reduce tx power information in bt coex host command

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-commands.h b/drivers/net/wireless/iwlwifi/iwl-commands.h
index 15e9bfb..e5dfbfd 100644
--- a/drivers/net/wireless/iwlwifi/iwl-commands.h
+++ b/drivers/net/wireless/iwlwifi/iwl-commands.h
@@ -1916,7 +1916,8 @@
 	u8 bt3_timer_t2_value;
 	__le16 bt4_reaction_time; /* unused */
 	__le32 bt3_lookup_table[IWLAGN_BT_DECISION_LUT_SIZE];
-	__le16 bt4_decision_time; /* unused */
+	u8 reduce_txpower;
+	u8 reserved;
 	__le16 valid;
 };