[U-Boot] [PATCH 3/4] [v2] nand_util: drop trailing all-0xff pages if requested

[Detlev Zundel <dzu@denx.de>]

Hi Ben,

> Add a flag to nand_read_skip_bad() such that if true, any trailing
> pages in an eraseblock whose contents are entirely 0xff will be
> dropped.
>
> The implementation is via a new drop_ffs() function which is
> based on the function of the same name from the ubiformat
> utility by Artem Bityutskiy.
>
> This is as-per the reccomendations of the UBI FAQ [1]
>
> Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
> CC: Artem Bityutskiy <dedekind1@gmail.com>

Acked-by: Detlev Zundel <dzu@denx.de>

Cheers
  Detlev

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