Add U-Boot support for Olimex's A13-SOM

A13-SOM is Allwinner A13
based SOM with 512MB DDR3.
There is no AXP PMU.
Hardware:
 A13 SoC
 uSD card slot
 512MB DDR3
 4 connectors with 0.05inch step.

http://olimex.com
Signed-off-by: HeHoPMaJIeH <gamishev@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
uboot: add support for pcDuino3

This patchset adds u-boot support for pcDuino3. The board
has been stress-tested for clock=480 and FAST_MBUS, and
has proven to be stable so far.

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>