[SCSI] sym53c8xx: fix free_irq() regression

The following commit changed the pointer passed to request_irq(), but
failed to change the pointer passed to free_irq():

commit 99c9e0a1
Author: Matthew Wilcox <matthew@wil.cx>
Date:   Fri Oct 5 15:55:12 2007 -0400

    [SCSI] sym53c8xx: Make interrupt handler capable of returning IRQ_NONE

    ...

The result is that free_irq() doesn't actually take any action.  This
patch fixes it.
Signed-off-by: NTony Battersby <tonyb@cybernetics.com>
Acked-by: NChristoph Hellwig <hch@infradead.org>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/sym53c8xx_2/sym_glue.c

@@ -1243,7 +1243,7 @@ static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
 	 *  Free O/S specific resources.
 	 */
 	if (pdev->irq)
-		free_irq(pdev->irq, np);
+		free_irq(pdev->irq, np->s.host);
 	if (np->s.ioaddr)
 		pci_iounmap(pdev, np->s.ioaddr);
 	if (np->s.ramaddr)