Btrfs: fix definition of struct btrfs_extent_inline_ref

use __le64 instead of u64 in on-disk structure definition.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

fs/btrfs/ctree.h

@@ -483,7 +483,7 @@ struct btrfs_shared_data_ref {
 
 struct btrfs_extent_inline_ref {
 	u8 type;
-	u64 offset;
+	__le64 offset;
 } __attribute__ ((__packed__));
 
 /* old style backrefs item */