[opensbi] create opensbi from T-Head official:

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

Change-Id: I7b39d66729e0108661a6f4c9e28acbdb303684ea

opensbi/include/sbi/riscv_locks.h

@@ -0,0 +1,45 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2019 Western Digital Corporation or its affiliates.
+ * Copyright (c) 2021 Christoph Müllner <cmuellner@linux.com>
+ */
+
+#ifndef __RISCV_LOCKS_H__
+#define __RISCV_LOCKS_H__
+
+#include <sbi/sbi_types.h>
+
+#define TICKET_SHIFT	16
+
+typedef struct {
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+       u16 next;
+       u16 owner;
+#else
+       u16 owner;
+       u16 next;
+#endif
+} __aligned(4) spinlock_t;
+
+#define __SPIN_LOCK_UNLOCKED	\
+	(spinlock_t) { 0, 0 }
+
+#define SPIN_LOCK_INIT(x)	\
+	x = __SPIN_LOCK_UNLOCKED
+
+#define SPIN_LOCK_INITIALIZER	\
+	__SPIN_LOCK_UNLOCKED
+
+#define DEFINE_SPIN_LOCK(x)	\
+	spinlock_t SPIN_LOCK_INIT(x)
+
+int spin_lock_check(spinlock_t *lock);
+
+int spin_trylock(spinlock_t *lock);
+
+void spin_lock(spinlock_t *lock);
+
+void spin_unlock(spinlock_t *lock);
+
+#endif