MIPS: ath79: allow to specify bus number in PCI IRQ maps

This is needed for multiple PCI bus support.
Signed-off-by: NGabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4913/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

arch/mips/ath79/pci.c

@@ -75,7 +75,9 @@ int __init pcibios_map_irq(const struct pci_dev *dev, uint8_t slot, uint8_t pin)
 		const struct ath79_pci_irq *entry;
 
 		entry = &ath79_pci_irq_map[i];
-		if (entry->slot == slot && entry->pin == pin) {
+		if (entry->bus == dev->bus->number &&
+		    entry->slot == slot &&
+		    entry->pin == pin) {
 			irq = entry->irq;
 			break;
 		}

arch/mips/ath79/pci.h

@@ -14,6 +14,7 @@
 #define _ATH79_PCI_H
 
 struct ath79_pci_irq {
+	int	bus;
 	u8	slot;
 	u8	pin;
 	int	irq;