This patch adds the first driver that actually uses the callback
function for attention LEDs that the acpiphp-attention patch
adds.  It searches the ACPI namespace for IBM hardware, sets up
the callbacks and sets up a handler to read ACPI events and
forward them on to /proc/acpi/event.  It also exports an ACPI
table that shows current hotplug status to userland.
Signed-off-by: Vernon Mauery <vernux@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>