ide: fix ->init_chipset method to return 'int' value

* Return 0 instead of dev->irq in ->init_chipset implementations.

* Fix ->init_chipset method to return 'int' value instead of
  'unsigned int' one.

This fixes ->init_chipset handling for host drivers (cs5530, hpt366
and pdc202xx_new) for which it is possible for this method to fail.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
index 79e3244..75e3bec 100644
--- a/drivers/ide/setup-pci.c
+++ b/drivers/ide/setup-pci.c
@@ -524,7 +524,7 @@
 		if (noisy)
 			printk(KERN_INFO "%s %s: not 100%% native mode: will "
 				"probe irqs later\n", d->name, pci_name(dev));
-		pciirq = ret;
+		pciirq = 0;
 	} else if (!pciirq && noisy) {
 		printk(KERN_WARNING "%s %s: bad irq (%d): will probe later\n",
 			d->name, pci_name(dev), pciirq);