gpio: pch: Use dev_get_drvdata

Instead of using to_pci_dev + pci_get_drvdata,
use dev_get_drvdata to make code simpler.
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Acked-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/gpio/gpio-pch.c

@@ -409,8 +409,7 @@ static int pch_gpio_probe(struct pci_dev *pdev,
 
 static int __maybe_unused pch_gpio_suspend(struct device *dev)
 {
-	struct pci_dev *pdev = to_pci_dev(dev);
-	struct pch_gpio *chip = pci_get_drvdata(pdev);
+	struct pch_gpio *chip = dev_get_drvdata(dev);
 	unsigned long flags;
 
 	spin_lock_irqsave(&chip->spinlock, flags);
@@ -422,8 +421,7 @@ static int __maybe_unused pch_gpio_suspend(struct device *dev)
 
 static int __maybe_unused pch_gpio_resume(struct device *dev)
 {
-	struct pci_dev *pdev = to_pci_dev(dev);
-	struct pch_gpio *chip = pci_get_drvdata(pdev);
+	struct pch_gpio *chip = dev_get_drvdata(dev);
 	unsigned long flags;
 
 	spin_lock_irqsave(&chip->spinlock, flags);