[PARISC] Define pci_get_legacy_ide_irq

We can compile at least one IDE driver that refers to this.  We can't
use the asm-generic file because we have our own definitions of
pcibios_resource_to_bus etc.
Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

include/asm-parisc/pci.h

@@ -293,4 +293,9 @@ static inline void pcibios_penalize_isa_irq(int irq, int active)
 	/* We don't need to penalize isa irq's */
 }
 
+static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
+{
+	return channel ? 15 : 14;
+}
+
 #endif /* __ASM_PARISC_PCI_H */