add MPC8343 based board mvBlueLYNX-M7 (doc+config)

Add MPC8343 based board mvBlueLYNX-M7.
It's a single board stereo camera system.
Please read doc/README.mvblm7 for details.

Signed-off-by: Andre Schwarz <andre.schwarz@matrix-vision.de>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>