fs: btrfs: Add more checksum algorithms

This mostly crossports crypto/hash.[ch] from btrfs-progs.

The differences are:
- No blake2 support
  No blake2 related library in U-Boot yet.

- Use uboot xxhash/sha256 directly
  No need to implement the code as U-Boot has already provided the
  interface.

This adds the support for the following csums:
- SHA256
- XXHASH

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Marek Behún <marek.behun@nic.cz>

fs/btrfs/disk-io.c

@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0+
+#include <common.h>
+#include <fs_internal.h>
+#include "disk-io.h"
+#include "crypto/hash.h"
+
+int btrfs_csum_data(u16 csum_type, const u8 *data, u8 *out, size_t len)
+{
+	memset(out, 0, BTRFS_CSUM_SIZE);
+
+	switch (csum_type) {
+	case BTRFS_CSUM_TYPE_CRC32:
+		return hash_crc32c(data, len, out);
+	case BTRFS_CSUM_TYPE_XXHASH:
+		return hash_xxhash(data, len, out);
+	case BTRFS_CSUM_TYPE_SHA256:
+		return hash_sha256(data, len, out);
+	default:
+		printf("Unknown csum type %d\n", csum_type);
+		return -EINVAL;
+	}
+}