drm/radeon: Use dev_get_drvdata where possible

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: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_drv.c

@@ -358,15 +358,13 @@ radeon_pci_shutdown(struct pci_dev *pdev)
 
 static int radeon_pmops_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 radeon_suspend_kms(drm_dev, true, true, false);
 }
 
 static int radeon_pmops_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);
 
 	/* GPU comes up enabled by the bios on resume */
 	if (radeon_is_px(drm_dev)) {
@@ -380,15 +378,13 @@ static int radeon_pmops_resume(struct device *dev)
 
 static int radeon_pmops_freeze(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 radeon_suspend_kms(drm_dev, false, true, true);
 }
 
 static int radeon_pmops_thaw(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 radeon_resume_kms(drm_dev, false, true);
 }
 
@@ -447,8 +443,7 @@ static int radeon_pmops_runtime_resume(struct device *dev)
 
 static int radeon_pmops_runtime_idle(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);
 	struct drm_crtc *crtc;
 
 	if (!radeon_is_px(drm_dev)) {