[Feature]add MT2731_MP2_MR2_SVN388 baseline version

Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/um/drivers/slip.h b/src/kernel/linux/v4.14/arch/um/drivers/slip.h
new file mode 100644
index 0000000..0f3b7ca
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/um/drivers/slip.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __UM_SLIP_H
+#define __UM_SLIP_H
+
+#include "slip_common.h"
+
+struct slip_data {
+	void *dev;
+	char name[sizeof("slnnnnn\0")];
+	char *addr;
+	char *gate_addr;
+	int slave;
+	struct slip_proto slip;
+};
+
+extern const struct net_user_info slip_user_info;
+
+extern int slip_user_read(int fd, void *buf, int len, struct slip_data *pri);
+extern int slip_user_write(int fd, void *buf, int len, struct slip_data *pri);
+
+#endif