[PATCH 1/2] erofs-utils: rename `cfg` to `g_cfg`

[Gao Xiang]

On 2024/9/18 23:30, Hongzhen Luo wrote:
> Rename the global variable `cfg` to `g_cfg` in preparation for
> the per-superblock configuration.

I think the global configuration is still needed.

But you need to seperate all mkfs configurations from
cfg into a new structure `erofs_mkfs_buildtree_args` instead.

Thanks,
Gao Xiang