Introduce a port for T-HEAD CK802. A simple demo for T-HEAD CB2201 is also included.

FreeRTOS/Demo/T-HEAD_CB2201_CDK/driver/uart.h

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+/*
+ * Copyright (C) 2017 C-SKY Microsystems Co., Ltd. All rights reserved.
+ *
+ * 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.
+ */
+
+#ifndef UART_H
+#define UART_H
+void console_init(void);
+#endif