add drv_uart.c drv_uart.h

bsp/imxrt1052-evk/drivers/drv_uart.h

@@ -0,0 +1,23 @@
+/*
+ * File      : drv_uart.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2009, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-10-10     Tanek        the first version
+ */
+
+#ifndef __USART_H__
+#define __USART_H__
+
+#include <rthw.h>
+#include <rtthread.h>
+
+int rt_hw_usart_init(void);
+
+#endif