tools/power/turbostat: Abstract Perf Limit Reasons MSRs support

Abstract the support for MSR_CORE/GFX/RING_PERF_LIMIT_REASONS MSRs.

Delete perf_limit_reasons_probe() CPU model check.

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