[PATCH] Adding eraseblock header support(revised version)

[zhao forrest]

>
>zhao forrest wrote:
> > Your comments for the revised patch are welcome :)
>
>It is supposed that you eliminated cleanmarkers completely, right?
>Why then I still see functions like jffs2_check_nand_cleanmarker()?
>--

We'll allow mount old JFFS2 image if it used 1:1 mapping. So
during mount scan we need to scan both cleanmarker and eraseblock
header. So I don't change the name. Maybe a new name like
jffs2_check_nand_cleanmarker_ebh() is better.

Thanks,
Forrest