ACPI and power management fixes for 3.9-rc2

- Two fixes for the new intel_pstate driver from Dirk Brandewie.

- Fix for incorrect usage of the .find_bridge() callback from struct
  acpi_bus_type in the USB core and subsequent removal of that
  callback from Rafael J. Wysocki.

- ACPI processor driver cleanups from Chen Gang and Syam Sidhardhan.

- ACPI initialization and error messages fix from Joe Perches.

- Operating Performance Points documentation improvement from
  Nishanth Menon.

- Fixes for memory leaks and potential concurrency issues and sysfs
  attributes leaks during device removal in the core device PM QoS
  code from Rafael J. Wysocki.

- Calxeda Highbank cpufreq driver simplification from Emilio López.

- cpufreq comment cleanup from Namhyung Kim.

- Fix for a section mismatch in Calxeda Highbank interprocessor
  communication code from Mark Langsdorf (this is not a PM fix
  strictly speaking, but the code in question went in through the
  PM tree).

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