With certain features being convert to DM now we want sunxi to default
to having DM enabled for ETH/SERIAL and USB in some cases.

Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: NTom Rini <trini@konsulko.com>
[hdegoede@redhat.com: Also select CONFIG_USB for all sunxi builds]
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Acked-by: NIan Campbell <ijc@hellion.org.uk>
Reviewed-by: NSimon Glass <sjg@chromium.org>