iwlwifi: remove device type checking for tx power in debugfs

Instead of checking device type for enable/disable tx power control,
move it to .cfg for better control and more flexibilities.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index b071e1b..0faadf3 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -1647,8 +1647,7 @@
 	DEBUGFS_ADD_BOOL(disable_sensitivity, dir_rf, &priv->disable_sens_cal);
 	DEBUGFS_ADD_BOOL(disable_chain_noise, dir_rf,
 			 &priv->disable_chain_noise_cal);
-	if (((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965) ||
-	    ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_3945))
+	if (priv->cfg->tx_power_by_driver)
 		DEBUGFS_ADD_BOOL(disable_tx_power, dir_rf,
 				&priv->disable_tx_power_cal);
 	return 0;