[Feature]add MT2731_MP2_MR2_SVN388 baseline version

Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/bsp/lk/lib/sha256/include/sha256.h b/src/bsp/lk/lib/sha256/include/sha256.h
new file mode 100644
index 0000000..8e746d5
--- /dev/null
+++ b/src/bsp/lk/lib/sha256/include/sha256.h
@@ -0,0 +1,13 @@
+#include <sys/types.h>
+
+#define SHA256_BLOCK_SIZE       64
+
+struct sha256_context {
+    u32 state[8];
+    u64 count;
+    u8 buf[SHA256_BLOCK_SIZE];
+};
+
+int sha256_start(struct sha256_context *s_ctx);
+int sha256_process(struct sha256_context *s_ctx, const u8 *input, unsigned int len);
+int sha256_end(struct sha256_context *s_ctx, u8 *out);