I think this CPU was added before RIOT had support for the FPU on Cortex-M4F, this should now have been long fixed. Advertise the FPU on these CPUs.
MCG_Lite is used in many KL parts and is a less advanced clock generator than the full MCG used in the K series. This change lets the MCG_Lite and MCG share the same user facing API, with some configuration differences.