PCI: xilinx: Remove unused platform data

The xilinx driver never uses the platform drvdata pointer, so don't
bother setting it.  No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/host/pcie-xilinx.c

@@ -688,8 +688,6 @@ static int xilinx_pcie_probe(struct platform_device *pdev)
 	pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
 #endif
 	pci_bus_add_devices(bus);
-	platform_set_drvdata(pdev, port);
-
 	return 0;
 
 error: