[PATCH v5 04/14] smegw01: Add altbootcmd

[sbabic at denx.de]

> From: Eduard Strehlau <eduard at lionizers.com>
> Add an altbootcmd script, which is convenient way to integrate with
> swupdate and perform a roll back of the previous working version in the
> case of update failure.
> Signed-off-by: Eduard Strehlau <eduard at lionizers.com>
> Signed-off-by: Fabio Estevam <festevam at denx.de>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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