Add support for Congatec QMX6

Add support for the iMX6 based conga-QMX6 family of Qseven modules.

This patch is based on Linux 3.0.35 from Congatec's kernel reporitory

[Peter: slightly simplify post build script]
Signed-off-by: Stephan Hoffmann <sho@relinux.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>