[U-Boot, 12/13] board: ge: bx50v3, mx53ppd: fix firstboot detection

[sbabic at denx.de]

> From: Robert Beckett <bob.beckett at collabora.com>
> Use `test' command to test for file existence instead of relying on the
> old functionality of the `ext2load' command (which now reports an error
> when attempting to load a zero length file).
> Signed-off-by: Robert Beckett <bob.beckett at collabora.com>
> Signed-off-by: Ian Ray <ian.ray at ge.com>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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