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/delkin_cb.c b/drivers/ide/delkin_cb.c
index 8f1b2d9..bacb119 100644
--- a/drivers/ide/delkin_cb.c
+++ b/drivers/ide/delkin_cb.c
@@ -46,7 +46,7 @@
 	.quirkproc		= ide_undecoded_slave,
 };
 
-static unsigned int delkin_cb_init_chipset(struct pci_dev *dev)
+static int delkin_cb_init_chipset(struct pci_dev *dev)
 {
 	unsigned long base = pci_resource_start(dev, 0);
 	int i;