Merge branch 'pm-cpuidle'

Merge branch 'pm-cpuidle'

* pm-cpuidle:
  drivers: cpuidle: initialize big.LITTLE driver through DT
  drivers: cpuidle: CPU idle ARM64 driver
  drivers: cpuidle: implement DT based idle states infrastructure
  cpuidle: big.LITTLE: add Exynos5800 compatible string
  cpuidle: Replace strnicmp with strncasecmp
  arm64: add PSCI CPU_SUSPEND based cpu_suspend support
  arm64: kernel: introduce cpu_init_idle CPU operation
  arm64: kernel: refactor the CPU suspend API for retention states
  Documentation: arm: define DT idle states bindings