pci_get_legacy_ide_irq
#define ATA_PRIMARY_IRQ(dev) pci_get_legacy_ide_irq(dev, 0)
#define ATA_SECONDARY_IRQ(dev) pci_get_legacy_ide_irq(dev, 1)
int (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
if (ppc_md.pci_get_legacy_ide_irq)
return ppc_md.pci_get_legacy_ide_irq(dev, channel);