cpu/kinetis: use $(MAKEFILEDIR)
cpu/kinetis: use $(MAKEFILEDIR)

OTAkeys/RIOT,kaspar030/RIOT,miri64/RIOT,ant9000/RIOT,jasonatran/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,OlegHahm/RIOT,authmillenon/RIOT,OlegHahm/RIOT,ant9000/RIOT,authmillenon/RIOT,kaspar030/RIOT,basilfx/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,authmillenon/RIOT,kYc0o/RIOT,miri64/RIOT,authmillenon/RIOT,basilfx/RIOT,basilfx/RIOT,basilfx/RIOT,miri64/RIOT,jasonatran/RIOT,miri64/RIOT,miri64/RIOT,kaspar030/RIOT,kaspar030/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,jasonatran/RIOT,jasonatran/RIOT,jasonatran/RIOT,ant9000/RIOT,ant9000/RIOT,RIOT-OS/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,ant9000/RIOT,OTAkeys/RIOT,authmillenon/RIOT,kYc0o/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,basilfx/RIOT