PCI: generic: Drop pci_fixup_irqs()

Since, through struct pci_host_bridge.map/swizzle_irq hooks, IRQs are now
allocated in the pci_assign_irq() callback automatically, PCI host bridge
drivers can stop relying on pci_fixup_irqs() for IRQ allocation.

Drop pci_fixup_irqs() usage from PCI host-common bridge driver.

Signed-off-by: Lorenzo Pieralisi <[e-mail]>
Signed-off-by: Bjorn Helgaas <[e-mail]>
Acked-by: Will Deacon <[e-mail]>

drivers/pci/host/pci-host-common.c

···
 	bridge->sysdata = cfg;
 	bridge->busnr = cfg->busr.start;
 	bridge->ops = &ops->pci_ops;
+	bridge->map_irq = of_irq_parse_and_map_pci;
+	bridge->swizzle_irq = pci_common_swizzle;
 
 	ret = pci_scan_root_bus_bridge(bridge);
 	if (ret < 0) {
···
 	}
 
 	bus = bridge->bus;
-
-#ifdef CONFIG_ARM
-	pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
-#endif
 
 	/*
 	 * We insert PCI resources into the iomem_resource and