iwlagn: temperature should be measure for all _agn devices

Thermal throttling functions are available for all _agn devices, call the
functions directly.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index 1b69507..80c3565 100644
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -484,10 +484,7 @@
 		spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 
 		IWL_ERR(priv, "No space in command queue\n");
-		if (priv->cfg->ops->lib->tt_ops.ct_kill_check) {
-			is_ct_kill =
-				priv->cfg->ops->lib->tt_ops.ct_kill_check(priv);
-		}
+		is_ct_kill = iwl_check_for_ct_kill(priv);
 		if (!is_ct_kill) {
 			IWL_ERR(priv, "Restarting adapter due to queue full\n");
 			iwlagn_fw_error(priv, false);