Hi Pradnya,
Unfortunately there’s no LIN support in the SDK for MPC57xx devices and there are no plans to add it. The LINFlexD module itself supports LIN protocol 1.3, 2.0 and 2.1 but the LIN stack was not implemented for some reasons.
So, we don't have the LIN stack and therefore there’s also no support for ldf files.
Regards,
Lukas