btrfs-progs: pass alloc_chunk_ctl to chunk_bytes_by_type
    
    Pass the whole alloc_chunk_ctl to chunk_bytes_by_type instead of its
    num_stripes and sub_stripes members.
    
    Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
    Signed-off-by: David Sterba <dsterba@suse.com>