spi: dw-pci: 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>
Link: https://lore.kernel.org/r/20190724122331.21856-1-hslester96@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-dw-pci.c

@@ -98,16 +98,14 @@ static void spi_pci_remove(struct pci_dev *pdev)
 #ifdef CONFIG_PM_SLEEP
 static int spi_suspend(struct device *dev)
 {
-	struct pci_dev *pdev = to_pci_dev(dev);
-	struct dw_spi *dws = pci_get_drvdata(pdev);
+	struct dw_spi *dws = dev_get_drvdata(dev);
 
 	return dw_spi_suspend_host(dws);
 }
 
 static int spi_resume(struct device *dev)
 {
-	struct pci_dev *pdev = to_pci_dev(dev);
-	struct dw_spi *dws = pci_get_drvdata(pdev);
+	struct dw_spi *dws = dev_get_drvdata(dev);
 
 	return dw_spi_resume_host(dws);
 }