[PATCH] imx8m_evk: Remove unneeded earlycon string

[sbabic at denx.de]

> Passing earlycon string in the command line may be
> useful during bring up, but not after such phase.
> Remove the earlycon string to align with the other i.MX SoCs
> command lines.
> Signed-off-by: Fabio Estevam <festevam at gmail.com>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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