iwlwifi: fix software rf_kill problem when interface is down

The patch fixes the problem that software rf_kill messes up the
card status when it is disabled if the interface is down.
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl3945-base.c

@@ -2875,6 +2875,7 @@ static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
 		return;
 	}
 
+	if (priv->is_open)
 		queue_work(priv->workqueue, &priv->restart);
 	return;
 }

drivers/net/wireless/iwlwifi/iwl4965-base.c

@@ -970,6 +970,7 @@ int iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
 		return 0;
 	}
 
+	if (priv->is_open)
 		queue_work(priv->workqueue, &priv->restart);
 	return 1;
 }