iwlwifi: remove shadow_reg_enable from hw_params

There's no need to copy shadow_reg_enable into
hw_params since it is a pure hardware parameter
that will never change, we can access it from
the config directly.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans-pcie-rx.c b/drivers/net/wireless/iwlwifi/iwl-trans-pcie-rx.c
index e8d3129..911a9f1 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans-pcie-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-trans-pcie-rx.c
@@ -141,7 +141,7 @@
 	if (q->need_update == 0)
 		goto exit_unlock;
 
-	if (hw_params(trans).shadow_reg_enable) {
+	if (cfg(trans)->base_params->shadow_reg_enable) {
 		/* shadow register enabled */
 		/* Device expects a multiple of 8 */
 		q->write_actual = (q->write & ~0x7);