References: https://bugzilla.novell.com/show_bug.cgi?id=302482

Due to the new autloading of acpi drivers, the dock driver
wasn't loaded anymore as there is no HID to identify it with
(dock is needed if ACPI has a  _DCK method).
This patch is a workaround for this, original by Thomas Renninger,
revised first by Kay Sievers and last by Frank Seidel.
V2 of this patch fixed problems on systems without a defined _CID for
the docking devices.
Signed-off-by: Thomas Renninger <trenn@novell.com>
Signed-off-by: Kay Sievers <kasievers@novell.com>
Signed-off-by: Frank Seidel <fseidel@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>