[PATCH v2 1/2] ARM: imx: imx8mn-evk: enable DM_SERIAL

[sbabic at denx.de]

> U-Boot complains that CONFIG_SERIAL is not converted to CONFIG_DM_SERIAL
> and gives a deadline before possibly removing the board. Migrate to
> DM_SERIAL to fulfill the request.
> Signed-off-by: Heiko Thiery <heiko.thiery at gmail.com>
> Reviewed-by: Fabio Estevam <festevam at denx.de>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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