ARM: dts: mstar: Add board for 100ask DongShanPiOne

The DongShanPiOne is little SigmaStar SSD202D based module
from 100ask.

Add an initial dts for this board.

Link: http://linux-chenxing.org/infinity2/dongshanpione/


Signed-off-by: Daniel Palmer <daniel@0x0f.com>