PCI: dwc: pci-dra7xx: Fix runtime PM imbalance on error

pm_runtime_get_sync() increments the runtime PM usage counter even
it returns an error code. Thus a pairing decrement is needed on
the error handling path to keep the counter balanced.

Link: https://lore.kernel.org/r/20200520084756.31620-1-dinghao.liu@zju.edu.cn
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

drivers/pci/controller/dwc/pci-dra7xx.c

@@ -998,9 +998,8 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
 	return 0;
 
 err_gpio:
-	pm_runtime_put(dev);
-
 err_get_sync:
+	pm_runtime_put(dev);
 	pm_runtime_disable(dev);
 	dra7xx_pcie_disable_phy(dra7xx);