[ramdisk] add cvitek pre-built ramdisk

Change-Id: Ic7d2046a23358129eaf621b5558984a64fa7361d

ramdisk/initramfs/glibc_riscv64/usr/include/linux/rpmsg.h

@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (c) 2016, Linaro Ltd.
+ */
+
+#ifndef _RPMSG_H_
+#define _RPMSG_H_
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+/**
+ * struct rpmsg_endpoint_info - endpoint info representation
+ * @name: name of service
+ * @src: local address
+ * @dst: destination address
+ */
+struct rpmsg_endpoint_info {
+	char name[32];
+	__u32 src;
+	__u32 dst;
+};
+
+#define RPMSG_CREATE_EPT_IOCTL	_IOW(0xb5, 0x1, struct rpmsg_endpoint_info)
+#define RPMSG_DESTROY_EPT_IOCTL	_IO(0xb5, 0x2)
+
+#endif