iwlwifi: use .cfg to enable/disable continuous ucode trace

Instead of checking device type for enable/disable continuous ucode
trace function; put it in .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-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index 460aea3..a756fd4 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -2263,7 +2263,7 @@
 	.temperature_kelvin = true,
 	.max_event_log_size = 512,
 	.tx_power_by_driver = true,
-
+	.ucode_tracing = true,
 	/*
 	 * Force use of chains B and C for scan RX on 5 GHz band
 	 * because the device has off-channel reception on chain A.