Fix an issue in the PSCI cpuidle driver introduced recently and a nasty
x86 power regression introduced in 6.15:
- Prevent freeing an uninitialized pointer in error path of
dt_idle_state_present() in the PSCI cpuidle driver (Dan Carpenter).
- Revert an x86 commit that went into 6.15 and caused idle power,
including power in suspend-to-idle, to rise rather dramatically on
systems booting with "nosmt" in the kernel command line (Rafael Wysocki).
* pm-cpuidle:
Revert "x86/smp: Eliminate mwait_play_dead_cpuid_hint()"
cpuidle: psci: Fix uninitialized variable in dt_idle_state_present()
3d031d0d8d