PCI: hisi: Remove unused variable driver

The local "driver" variable was unused and caused a warning, so remove it:

  drivers/pci/dwc/pcie-hisi.c: In function 'hisi_pcie_probe':
  drivers/pci/dwc/pcie-hisi.c:271:24: warning: variable 'driver' set but not used [-Wunused-but-set-variable]
Signed-off-by: NShawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Acked-by: NZhou Wang <wangzhou1@hisilicon.com>
Acked-by: NGabriele Paoloni <gabriele.paoloni@huawei.com>

drivers/pci/dwc/pcie-hisi.c

@@ -268,7 +268,6 @@ static int hisi_pcie_probe(struct platform_device *pdev)
 	struct dw_pcie *pci;
 	struct hisi_pcie *hisi_pcie;
 	struct resource *reg;
-	struct device_driver *driver;
 	int ret;
 
 	hisi_pcie = devm_kzalloc(dev, sizeof(*hisi_pcie), GFP_KERNEL);
@@ -282,8 +281,6 @@ static int hisi_pcie_probe(struct platform_device *pdev)
 	pci->dev = dev;
 	pci->ops = &dw_pcie_ops;
 
-	driver = dev->driver;
-
 	hisi_pcie->pci = pci;
 
 	hisi_pcie->soc_ops = of_device_get_match_data(dev);