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

This is needed for multiple PCI bus support.

Signed-off-by: Gabor Juhos <[e-mail]>
Patchwork: http://patchwork.linux-mips.org/patch/4913/
Signed-off-by: John Crispin <[e-mail]>

arch/mips/ath79/pci.c

···
 		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

···
 #define _ATH79_PCI_H
 
 struct ath79_pci_irq {
+	int	bus;
 	u8	slot;
 	u8	pin;
 	int	irq;