PCI: xilinx: Don't call pci_fixup_irqs() on Microblaze

The Xilinx AXI PCIe Host Bridge Soft IP driver was previously only
supported on ARM (in particular, on ARCH_ZYNC), and pci_fixup_irqs() is
available there.  But Microblaze will do IRQ fixup in pcibios_add_device(),
so pci_fixup_irqs() is not available on Microblaze.

Don't call pci_fixup_irqs() on Microblaze, so the driver can work on both
Zynq and Microblaze Architectures.

[bhelgaas: revise changelog to show similarity to bdb8a1844f31 ("PCI: iproc: Call pci_fixup_irqs() for ARM64 as well as ARM")]
Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com>
Signed-off-by: Ravi Kiran Gummaluri <rgummal@xilinx.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Michal Simek <michal.simek@xilinx.com>

drivers/pci/host/pcie-xilinx.c

@@ -705,7 +705,9 @@ static int xilinx_pcie_probe(struct platform_device *pdev)
 #endif
 	pci_scan_child_bus(bus);
 	pci_assign_unassigned_bus_resources(bus);
+#ifndef CONFIG_MICROBLAZE
 	pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
+#endif
 	pci_bus_add_devices(bus);
 	platform_set_drvdata(pdev, port);