[PATCH v2] imx8mn: configs: add support for distro boot commands

[sbabic at denx.de]

> Supported boot device types in iMX8MN: MMC, DHCP.
> Add DISTRO_DEFAULTS config option and include the distro boot command
> header file to enable full support of distro boot on i.MX8M Nano EVK (both
> DDR and LPDDR derivatives).
> Drop previous environment, which was targeting customized boot commands and
> boot order.
> Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin at leica-geosystems.com>
> Cc: Peng Fan <peng.fan at nxp.com>
> Reviewed-by: Fabio Estevam <festevam at gmail.com>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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