[PATCH] imx8qxp_mek: Start with USDHC2 unpowered

[sbabic at denx.de]

> After triggering a "reboot" command in Linux the following
> hang in SPL is observed:
> U-Boot SPL 2020.04 (Apr 15 2020 - 10:49:29 -0300)
> Normal Boot
> WDT:   Not found!
> Trying to boot from MMC2_2
> spl: mmc init failed with error: -70
> SPL: failed to boot from all boot devices
> ### ERROR ### Please RESET the board ###
> This error happens because the CMD_ERR bit is set in the IRQ status
> register after booting from Linux.
> To ensure a fresh start, force the VMMC supply to get unpowered first.
> Signed-off-by: Fabio Estevam <festevam at gmail.com>
> Reviewed-by: Peng Fan <peng.fan at nxp.com>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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