After the commit d6cb0a63d1a77da21e7f9cb7ca6561371b3fc896 ( https://git.yoctoproject.org/cgit/cgit.cgi/meta-freescale/commit/?h=dunfell&id=d6cb0a63d1a77da21e7f9cb7ca6561371b3fc896 ) the functionality that inserts the configuration from the file deviceconfig.cfg to .conf was broken. I guess it is related to changing order of tasks.