rtcio: support rtcio on c6

components/soc/esp32/include/soc/rtc_io_channel.h

@@ -1,22 +1,12 @@
-// Copyright 2010-2016 Espressif Systems (Shanghai) PTE LTD
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+/*
+ * SPDX-FileCopyrightText: 2010-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
 #ifndef _SOC_RTC_IO_CHANNEL_H
 #define _SOC_RTC_IO_CHANNEL_H
 
-#define RTC_GPIO_NUMBER             18
-
 //RTC GPIO channels
 #define RTCIO_GPIO36_CHANNEL        0   //RTCIO_CHANNEL_0
 #define RTCIO_CHANNEL_0_GPIO_NUM    36