PCI: faraday: Fix wrong pointer passed to PTR_ERR()

PTR_ERR should access the value just tested by IS_ERR, otherwise the wrong
error code will be returned.

Fixes: 2eeb02b28579 ("PCI: faraday: Add clock handling")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pci/host/pci-ftpci100.c

@@ -481,7 +481,7 @@ static int faraday_pci_probe(struct platform_device *pdev)
 	}
 	p->bus_clk = devm_clk_get(dev, "PCICLK");
 	if (IS_ERR(p->bus_clk))
-		return PTR_ERR(clk);
+		return PTR_ERR(p->bus_clk);
 	ret = clk_prepare_enable(p->bus_clk);
 	if (ret) {
 		dev_err(dev, "could not prepare PCICLK\n");