ARM: dts: sun8i: Add device tree for Cubietruck Plus

Cubietruck Plus is a A83T/H8 based development board. The board has
standard DDR3 SDRAM, AXP818 PMIC/codec, SD/MMC, eMMC, USB 2.0 host
via HSIC USB Hub, USB OTG, SATA via USB bridge, gigabit ethernet,
WiFi, headphone out / mic in, and various GPIO headers.

The board also has an EEPROM on i2c0 which holds the MAC address.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>