usb:sunxi:Fix USB on Hackberry

Hackberry has OTG port wired as host-only port. It seems that wiring is done so that USB0-IDDET is not pulled down.
This is wrong and leaves port without power.
Commit sets power on if port is defined as host-only in fex file or compile time.

Commit affects also auxtek-t003, mini-x_a10s, megafeis_a08 and mk802_a10s.

Signed-off-by: Jari Helaakoski <tekkuli@gmail.com>