tools/power/turbostat: Adjust cstate for is_slm()/is_knl()/is_cnl()/is_ehl() models

Disable CC3 for is_slm()/is_knl()/is_cnl()/is_ehl() models.

Delete is_cnl()/is_ehl() CPU model checks.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Len Brown <len.brown@intel.com>