tools/power/x86/intel-speed-select: Utilize cpu_map to get physical id

cpu_map already has the cpu package id, die id information.
Thus there is no need to re-evaluating sysfs attributes or stored data
file to get the package id and die id of a given CPU each time.

In order to unitlize this, cpu_map needs to be created unconditionally.

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