[PATCH v2] mx6sabreauto: Convert to DM_ETH

[sbabic at denx.de]

> This fixes the following warning:
> ===================== WARNING ======================
> This board does not use CONFIG_DM_ETH (Driver Model
> for Ethernet drivers). Please update the board to use
> CONFIG_DM_ETH before the v2020.07 release. Failure to
> update by the deadline may result in board removal.
> See doc/driver-model/migration.rst for more info.
> ====================================================
> Signed-off-by: Pedro Jardim <jardim.c.pedro at gmail.com>
> Reviewed-by: Fabio Estevam <festevam at gmail.com>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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