tools/power/turbostat: Enable the C-state Pre-wake printing

Currently the C-state Pre-wake will not be printed due to the
probe has not been invoked. Invoke the probe function accordingly.

Fixes: aeb01e6d ("tools/power turbostat: Print the C-state Pre-wake settings")
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Len Brown <len.brown@intel.com>