uboot-imx

sunxi: Enable CMD_USB and USB_STORAGE by default on sunxi

Start using the new Kconfig options which are available for these now,
and simply always enable them by selecting them as sunxi builds always
include USB support.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Reviewed-by: Simon Glass <sjg@chromium.org>