[U-Boot] imx: 8qxp_mek: fix fdt_file and console

[sbabic at denx.de]

> Fix fdt_file and console to boot upstream Linux Kernel.
> Upstream linux use imx8qxp-mek.dtb, and pass lpuart32 to earlycon
> will not work for i.MX8QXP, only need to pass earlycon,
> check drivers/tty/serial/earlycon.c,
> " /* Just 'earlycon' is a valid param for devicetree and ACPI SPCR. */ "
> Signed-off-by: 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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