[opensbi] create opensbi from T-Head official:

repo: https://github.com/T-head-Semi/opensbi
	commit: 89182b257c8798e15e4c685c1af0c2862d528d2a

Change-Id: I7b39d66729e0108661a6f4c9e28acbdb303684ea

opensbi/include/sbi/sbi_init.h

@@ -0,0 +1,23 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2019 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ *   Anup Patel <anup.patel@wdc.com>
+ */
+
+#ifndef __SBI_INIT_H__
+#define __SBI_INIT_H__
+
+#include <sbi/sbi_types.h>
+
+struct sbi_scratch;
+
+void __noreturn sbi_init(struct sbi_scratch *scratch);
+
+unsigned long sbi_init_count(u32 hartid);
+
+void __noreturn sbi_exit(struct sbi_scratch *scratch);
+
+#endif