Thnaks for the response ... yes i have copied the :
SDK_2.0_MK22FN1M0xxx12\devices\MK21FA12\drivers\fsl_clock.c
SDK_2.0_MK22FN1M0xxx12\devices\MK21FA12\drivers\fsl_clock.h
to the drivers files in my project ... the compilation is successful but the code is stuck at the following location indicating unsuccessful clock configuration :

I have used the KINETIS Expert to generate the .clock settings :

I have used SDK 2.0 on FRDM K64 sucessfully but on this chip it seems the SDK is not ready or its not compatible.