[U-Boot] [PATCH] sunxi: TZX-Q8-713B7 support

[Paul Kocialkowski]

This patch adds support for the TZX-Q8-713B7 tablet as described at:
http://linux-sunxi.org/TZX-Q8-713B7

All the things that are expected to work are going just fine, even host USB OTG
with the MUSB driver worked with both storage and a USB keyboard.

The DRAM configuration was not directly imported from the legacy u-boot-sunxi
tree. Instead, this uses dram_sun5i_auto with appropriate configuration.
The resulting DRAM config is not exactly the same, but things appear to work
just fine with dram_sun5i_auto (when booting a kernel and a full graphical
session).

The LCD mode configuration (CONFIG_VIDEO_LCD_MODE) only has fields that could
be determined reliably. Other fields (such as le,ri,up,lo and hs,vs) are left
to default values. Despite this, the LCD appears to be working just fine.