ARM: dts: imx6dl: Add Engicam i.CoreM6 DualLite/Solo RQS initial support

ARM: dts: imx6dl: Add Engicam i.CoreM6 DualLite/Solo RQS initial support

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/standard/i-core-rqs-m6s-dl-d-q

Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>