the throttling state in response to line transitions. Future plans
include adding support for CPU frequency changes.
Add a devd.conf entry for calling this script.
The default values for this are:
performance_cx_lowest="HIGH" # Use HLT (C0) online
performance_throttle_state="HIGH" # 100% (no throttling)
economy_cx_lowest="LOW" # Use the lowest Cx state possible
economy_throttle_state="HIGH" # 100% (no throttling)