iwlwifi: mvm: fix the ACK / CTS kill mask upon RSSI event

If a vif's RSSI gets good enough, we can enable reduced
Tx power. If so, we need to update the ACK / CTS kill mask
accordingly. Since the auditing for the interfaces was bad,
we enabled reduced Tx power, but didn't update the ACK / CTS
kill mask.
This is harmless since the firmware is most likely to
discard this setting anyway, but it is a good practice
to update it.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

drivers/net/wireless/iwlwifi/mvm/bt-coex.c

@@ -527,6 +527,8 @@ static void iwl_mvm_bt_rssi_iterator(void *_data, u8 *mac,
 					lockdep_is_held(&mvm->mutex));
 	mvmsta = (void *)sta->drv_priv;
 
+	data->num_bss_ifaces++;
+
 	/*
 	 * This interface doesn't support reduced Tx power (because of low
 	 * RSSI probably), then set bt_kill_msk to default values.