btrfs: make orphan cleanup less verbose

The messages

  btrfs: unlinked 123 orphans
  btrfs: truncated 456 orphans

are not useful to regular users and raise questions whether there are
problems with the filesystem.
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>

fs/btrfs/inode.c

@@ -3239,9 +3239,9 @@ int btrfs_orphan_cleanup(struct btrfs_root *root)
 	}
 
 	if (nr_unlink)
-		btrfs_info(root->fs_info, "unlinked %d orphans", nr_unlink);
+		btrfs_debug(root->fs_info, "unlinked %d orphans", nr_unlink);
 	if (nr_truncate)
-		btrfs_info(root->fs_info, "truncated %d orphans", nr_truncate);
+		btrfs_debug(root->fs_info, "truncated %d orphans", nr_truncate);
 
 out:
 	if (ret)