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

[Yue Hu]

On Sat,  4 Feb 2023 17:30:38 +0800
Gao Xiang <hsiangkao at linux.alibaba.com> 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: Yue Hu <huyue2 at coolpad.com>