[U-Boot] env_mmc: add support for redundant environment

[Tom Rini]

On Wed, Apr 10, 2013 at 10:36:19AM -0000, Michael Heimpold wrote:

> This patch add support for storing the environment redundant on
> mmc devices. Substantially it re-uses the logic from the NAND implementation,
> that means using an incremental counter for marking newer data.
> 
> Signed-off-by: Michael Heimpold <mhei at heimpold.de>

Applied to u-boot/master, thanks!

-- 
Tom
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