* fix a hang problem when loading the driver on (at least) a
  PCG-FX105k. Thanks to Jozef Kruger for reporting the problem
  and testing different versions of this fix.

* fix a .text.exit problem in the sonypi driver related to the
  recent PM changes (thanks to Adrian Bunk for the patch).

* fix the irq handling reports (make sonypi always report IRQ_HANDLED)
  because there *are* events belonging to the sonypi device which
  are not (yet) recognized by the driver and we don't want those
  to pollute the logs...

* test if the ACPI subsystem is not disabled before trying to
  use its ec_read/ec_write methods.

* fix the hangs when enabling bluetooth (thanks to Daniel K. for
  the patch).

* other miscellaneous small fixes.