Add a standard genimage script for the MXS processors (MX23 and MX28).
Based on the common scripts for the other imx devices:
board/freescale/common/genimage.cfg.template
board/freescale/common/post-image.sh
This makes it easier to add new MX23/MX28 boards configurations into
Buildroot.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>