Power management and ACPI fixes for v4.4-rc4

 - Fix a regression in the ACPI PCI host bridge initialization code
   introduced by the recent consolidation of the host bridge handling
   on x86 and ia64 that forgot to take one special piece of code
   related to NUMA on x86 into account (Liu Jiang).

 - Improve the Kconfig help description of the new ACPI AML debugger
   support option to avoid possible confusion (Peter Zijlstra).

 - Remove a piece of code in the generic power domains framework
   that should have been removed by one of the recent commits
   modifying that code (Ulf Hansson).

 - Reduce the log level of a PCI PM message that generates a lot
   of false-positive log noise for some drivers and improve the
   message itself while at it (Imre Deak).

 - Fix the OF-based domain lookup code in the generic power domains
   framework to make it drop references to DT nodes correctly (Eric
   Anholt).

 - Prevent the cpufreq core from setting the policy back to the
   default after a CPU offline/online cycle for cpufreq drivers
   providing the ->setpolicy callback (Srinivas Pandruvada).

 - Fix a build problem for CONFIG_ACPI unset in the device
   properties framework (Hanjun Guo).

 - Fix a stale file path in the ACPI backlight driver entry in
   MAINTAINERS (Dan Carpenter).

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