arm: imx6q: Add devicetree support for Engicam i.CoreM6 DualLite/Solo

arm: imx6q: Add devicetree support for Engicam i.CoreM6 DualLite/Solo

i.CoreM6 DualLite/Solo modules are system on module solutions
manufactured by Engicam with following characteristics:
CPU           NXP i.MX6 DL, 800MHz
RAM           1GB, 32, 64 bit, DDR3-800/1066
NAND          SLC,512MB
Power supply  Single 5V
MAX LCD RES   FULLHD

and more info at
http://www.engicam.com/en/products/embedded/som/sodimm/i-core-m6s-dl-d-q

Cc: Peng Fan <[email protected]>
Cc: Stefano Babic <[email protected]>
Cc: Fabio Estevam <[email protected]>
Cc: Matteo Lisi <[email protected]>
Cc: Michael Trimarchi <[email protected]>
Signed-off-by: Jagan Teki <[email protected]>