Re: [PATCH] imx: spl: Default to SPD when booting from USB serial download

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[PATCH] imx: spl: Default to SPD when booting from USB serial download

On the iMX platforms the USB boot is in fact boot from USB serial download and not from a USB mass storage. So returning BOOT_DEVICE_USB typically doesn't make sense as USB SPD is then used to continue booting, for this we need to return BOOT_DEVICE_BOARD. Still return BOOT_DEVICE_USB when USB