[PATCH] board: gateworks: venice: add eraseenv command

[sbabic at denx.de]

> Add eraseenv command and remove the unnecessary env command.
> Signed-off-by: Tim Harvey <tharvey at gateworks.com>
> Reviewed-by: Fabio Estevam <festevam at denx.de>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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