dbus: Do not quote scan_freq and freq_list

scan_freq and freq_list are not parsed by wpa_config_parse_freqs if
quoted.

Signed-hostap: Robert Shade <robert.shade@gmail.com>

wpa_supplicant/dbus/dbus_new_handlers.c

@@ -124,7 +124,7 @@ DBusMessage * wpas_dbus_error_invalid_args(DBusMessage *message,
 static const char *dont_quote[] = {
 	"key_mgmt", "proto", "pairwise", "auth_alg", "group", "eap",
 	"opensc_engine_path", "pkcs11_engine_path", "pkcs11_module_path",
-	"bssid", NULL
+	"bssid", "scan_freq", "freq_list", NULL
 };
 
 static dbus_bool_t should_quote_opt(const char *key)