More power management updates for 3.4

Fixes mostly, including:

* Patch series that hopefully fixes races between the freezer and request_firmware()
  and request_firmware_nowait() for good, with two cleanups from Stephen Boyd on top.

* Runtime PM fix from Alan Stern preventing tasks from getting stuck indefinitely
  in the runtime PM wait queue.

* Device PM QoS update from MyungJoo Ham introducing a new variant of
  pm_qos_update_request() allowing the callers to specify a timeout.
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