ACPI fixes for 3.10-rc7

- Fix for a regression causing a failure to turn on some devices on
  some systems during initialization introduced by a recent revert of
  an ACPI PM change that broke something else.

- ACPI power resources initialization fix preventing a NULL pointer
  from being dereferenced in the acpi_add_power_resource() error code
  path.

- ACPI dock station driver fix that adds missing locking to
  write_undock().

- ACPI resources allocation fix changing the scope of an old
  workaround so that it doesn't affect systems that aren't actually
  buggy.

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