[U-Boot] [U-Boot,13/17] imx6: wandboard: convert to DM_USB

[sbabic at denx.de]

> Drop CONFIG_USB_MAX_CONTROLLER_COUNT and enable DM_USB
> in defconfig.
> Signed-off-by: Anatolij Gustschin <agust at denx.de>

Applied to u-boot-imx, -next, thanks !

Best regards,
Stefano Babic

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