ARM: sun8i: dts: Add Ippo-q8h v1.2 with A33

ARM: sun8i: dts: Add Ippo-q8h v1.2 with A33

The Ippo-q8h is a tablet circuit board commonly found in cheap Android
tablets. The v1.2 version can be used with either an A23 or A33 SoC.

This version features 512 MB DRAM, 4G NAND, MMC, LCD, capacitive
touchscreen, accelerometer, 2 camera sensors, USB OTG, microphone
and speakers.

i2c0 is connected to the gsl1680 capacitive touch panel controller,
i2c1 is connected to an mma7660 3-axis accelerometer, these peripherals are
not supported by the kernel yet, i2c bus functionality has been tested via
i2c-dev.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
[maxime: Removed the resolution mention, and modified the compatible to
         have a unique one with the A23 version]
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>