RAPL path change

New RAPL driver has multi package support and no symlink to set
time window. Adjusted new path for RAPL cooling device.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Limit MSR P states control

Some old CPU's may not be able to control using direct P states.
So check for atleast Sandybridge or up.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>