- Handle the special case of ACPI device, the fixed feature button, which is not...

 - Handle the special case of ACPI device, the fixed feature button, which is not given a handle because it is the direct child of the ACPI root device and is not handled by acpi_bus_get_device (see FIXME in that function). Fortunately, this is not a problem for us since we don't need to differentiate between different "features" of each fixed feature button. We can simply enumerate it as "ACPI\FixedButton" based on its NULL handle.
 - Strange registry corruption bug on QEMU is gone now

svn path=/trunk/; revision=45773