drm/hisilicon: 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: Xinliang Liu <z.liuxinliang@hisilicon.com>

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c

@@ -66,16 +66,14 @@ static struct drm_driver hibmc_driver = {
 
 static int __maybe_unused hibmc_pm_suspend(struct device *dev)
 {
-	struct pci_dev *pdev = to_pci_dev(dev);
-	struct drm_device *drm_dev = pci_get_drvdata(pdev);
+	struct drm_device *drm_dev = dev_get_drvdata(dev);
 
 	return drm_mode_config_helper_suspend(drm_dev);
 }
 
 static int  __maybe_unused hibmc_pm_resume(struct device *dev)
 {
-	struct pci_dev *pdev = to_pci_dev(dev);
-	struct drm_device *drm_dev = pci_get_drvdata(pdev);
+	struct drm_device *drm_dev = dev_get_drvdata(dev);
 
 	return drm_mode_config_helper_resume(drm_dev);
 }