ACPI: Document handle_eject_request() arguments

Add argument descriptions to the handle_eject_request() kerneldoc
comment.
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/dock.c

@@ -380,6 +380,8 @@ static int dock_in_progress(struct dock_station *ds)
 
 /**
  * handle_eject_request - handle an undock request checking for error conditions
+ * @ds: The dock station to undock.
+ * @event: The ACPI event number associated with the undock request.
  *
  * Check to make sure the dock device is still present, then undock and
  * hotremove all the devices that may need removing.