sunxi: Ainol AW1 support

The Ainol AW1 is an A20 based tablet with a 800x480 lcd screen, sdio wifi,
volume up/down and home buttons, micro-sd slot, micro usb (otg), headphones
connector and a SPCI modem connector.

Also see: http://linux-sunxi.org/Ainol_AW1



Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>