iwlwifi: stop_hw replace enable_rfkill_int

This trans_ops->stop_hw leaves the RFKILL interrupt enabled,
we can call that one instead of enable_rfkill_int. By that,
we reduce the numbers of acceesses to the NIC from the upper
layers.

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 ed2a921..ec26950 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
+++ b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
@@ -1532,6 +1532,8 @@
 {
 	iwl_apm_stop(trans);
 
+	iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
+
 	/* Even if we stop the HW, we still want the RF kill interrupt */
 	IWL_DEBUG_ISR(trans, "Enabling rfkill interrupt\n");
 	iwl_write32(trans, CSR_INT_MASK, CSR_INT_BIT_RF_KILL);