sunxi: Make avs compile.

Functionality not tested.

Signed-off-by: Michal Suchanek <hramrach@gmail.com>
Make OTG the default since it cannot be selected by defconfig.

Signed-off-by: Michal Suchanek <hramrach@gmail.com>
Unify usb peripherial controller choice.

kconfig does not seem to like mixed choices so make all USB peripherial
drivers boolean until sunxi USB grows mudule support.

Signed-off-by: Michal Suchanek <hramrach@gmail.com>
sunxi: add kitchensink to defconfig.

Compile tested.

Contains most stuff you could possibly connect to a sunxi - devices
conecting through USB, Ethernet, SPI, I2C.

- add branch optimization

Not configured/unavalable:
- netconsole over USB - the USB gadget is not capable enough
- serial console over USB serial - needs compiled in USB serial drivers
- numerous filesystems are not included