[RESEND PATCH v1 5/9] colibri-imx6ull: use preboot for fdtfile evaluation

[sbabic at denx.de]

> From: Igor Opaniuk <igor.opaniuk at toradex.com>
> Enable and set preboot var with fdtfile evaluation.
> preboot will be checked and run immediately before starting the
> CONFIG_BOOTDELAY countdown and/or running the auto-boot command resp.
> entering interactive mode.
> This provides possibility to use different boot cmds in interactive mode
> without manual setting fdtfile value, as it it's already evaluated
> before entering interactive mode.
> Fixes: board: 31b1e17f44("toradex: add Colibri iMX6ULL support")
> Signed-off-by: Igor Opaniuk <igor.opaniuk at toradex.com>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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