mfd: timberdale: 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>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/timberdale.c

@@ -626,8 +626,7 @@ static const struct mfd_cell timberdale_cells_bar2[] = {
 static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
 	char *buf)
 {
-	struct pci_dev *pdev = to_pci_dev(dev);
-	struct timberdale_device *priv = pci_get_drvdata(pdev);
+	struct timberdale_device *priv = dev_get_drvdata(dev);
 
 	return sprintf(buf, "%d.%d.%d\n", priv->fw.major, priv->fw.minor,
 		priv->fw.config);