iwlwifi: make a static inline to read the RF kill register

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
index e6401e8..1d9724d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
+++ b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
@@ -981,8 +981,7 @@
 	}
 
 	/* If platform's RF_KILL switch is NOT set to KILL */
-	hw_rfkill = !(iwl_read32(trans, CSR_GP_CNTRL) &
-				CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
+	hw_rfkill = iwl_is_rfkill_set(trans);
 	iwl_op_mode_hw_rf_kill(trans->op_mode, hw_rfkill);
 
 	if (hw_rfkill) {
@@ -1422,8 +1421,7 @@
 
 	iwl_apm_init(trans);
 
-	hw_rfkill = !(iwl_read32(trans, CSR_GP_CNTRL) &
-				CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
+	hw_rfkill = iwl_is_rfkill_set(trans);
 	iwl_op_mode_hw_rf_kill(trans->op_mode, hw_rfkill);
 
 	return err;
@@ -1562,8 +1560,7 @@
 {
 	bool hw_rfkill;
 
-	hw_rfkill = !(iwl_read32(trans, CSR_GP_CNTRL) &
-				CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
+	hw_rfkill = iwl_is_rfkill_set(trans);
 
 	if (hw_rfkill)
 		iwl_enable_rfkill_int(trans);