[PATCH v3] Fix mtd-utils bugs

[stanley.miao]

Any other comments ?

Stanley.

Stanley.Miao wrote:
> Changes from V2:
> 1, Get the linux version via uname() according to Joakim Tjernlund.
> 2, Set the default version the latest version according to Joakim Tjernlund.
>
> The "struct nand_oobinfo" is able to record only 32 ECC code positions,which
> is not enough for many big NAND chips. Therefore, this structure is replaced
> by "struct nand_ecclayout" in linux kernel from the version 2.6.17.
> Consequently, the ioctl command changed from MEMGETOOBSEL to ECCGETLAYOUT.
>
> Now update nandwrite to use the new ioctl command ECCGETLAYOUT. In order to
> keep compatible with the old linux kernel, a linux version detection function
> is added.
>
> YAFFS and JFFS2 has updated and we don't need the arguments "forcelegacy",
> "forcejffs2", "forceyaffs" anymore. Now clean them up. 
>
>
> Stanley.
>
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