Mailbox: free mailbox interrupt before freeing blk queue

Free interrupt before freeing blk_queue to avoid
any attempt of access to blk_queue after it was freed.

Signed-off-by: Fernando Guzman Lugo <x0095840@ti.com>
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>

arch/arm/plat-omap/mailbox.c

@@ -298,11 +298,10 @@ static int omap_mbox_startup(struct omap_mbox *mbox)
 
 static void omap_mbox_fini(struct omap_mbox *mbox)
 {
+	free_irq(mbox->irq, mbox);
 	mbox_queue_free(mbox->txq);
 	mbox_queue_free(mbox->rxq);
 
-	free_irq(mbox->irq, mbox);
-
 	if (unlikely(mbox->ops->shutdown)) {
 		write_lock(&mboxes_lock);
 		if (mbox_configured > 0)