Merge branch 'pm-tools'

Merge cpupower utility updates for 6.20-rc1/7.0-rc1:

 - Fix miscellaneous problems in cpupower (Kaushlendra Kumar):

   * idle_monitor: Fix incorrect value logged after stop
   * Fix inverted APERF capability check
   * Use strcspn() to strip trailing newline
   * Reset errno before strtoull()
   * Show C0 in idle-info dump

 - Improve cpupower installation procedure by making the systemd step
   optional and allowing users to disable the installation of systemd's
   unit file (João Marcos Costa)

* pm-tools:
  cpupower: make systemd unit installation optional
  tools/power cpupower: Show C0 in idle-info dump
  tools/power cpupower: Reset errno before strtoull()
  tools/cpupower: Use strcspn() to strip trailing newline
  tools/cpupower: Fix inverted APERF capability check
  cpupower: idle_monitor: fix incorrect value logged after stop