sun7i: Add support for the Orange Pi board

The Orange Pi is an A20 based development board featuring 1G RAM, HDMI & VGA,
1Gbit ethernet, USB wifi, SATA, 4 USB 2.0 A receptacles, a micro USB B
receptacle (otg) and a 3 ring 3.5 mm jack connector for A/V.

Also see: http://www.orangepi.org/



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