From: Christoph Hellwig <hch@lst.de>

 - move delayed workqueue handling to schedule_delayed_work instead
   of the old horrible global list thing
 - add NCR5380_exit to make sure all delayed work is flushed on HBA
   (or module) removal
 - fix locking

Patch fixed up to apply and
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>