[PATCH v2] erofs: simplify erofs_read_inode()

[Yue Hu]

On Thu,  9 Nov 2023 19:18:22 +0800
Ferry Meng <mengferry at linux.alibaba.com> wrote:

> After commit 1c7f49a76773 ("erofs: tidy up EROFS on-disk naming"),
> there is a unique `union erofs_inode_i_u` so that we could parse
> the union directly.
> 
> Besides, it also replaces `inode->i_sb` with `sb` for simplicity.
> 
> Signed-off-by: Ferry Meng <mengferry at linux.alibaba.com>

Reviewed-by: Yue Hu <huyue2 at coolpad.com>