[PATCH 4/6] erofs: move zdata.h into zdata.c

[Chao Yu]

On 2023/2/4 17:30, Gao Xiang wrote:
> Definitions in zdata.h are only used in zdata.c and for internal
> use only.  No logic changes.
> 
> Signed-off-by: Gao Xiang <hsiangkao at linux.alibaba.com>

Reviewed-by: Chao Yu <chao at kernel.org>

Thanks,