drm/radeon: change variable name "dev" to "ddev" for consistency

In the probe function of amdgpu, it uses "ddev" as the name of "struct drm_device *",
so I suggest renaming it to be consistent.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Wu Hoi Pok <wuhoipok@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_drv.c

@@ -259,7 +259,7 @@ static int radeon_pci_probe(struct pci_dev *pdev,
 			    const struct pci_device_id *ent)
 {
 	unsigned long flags = 0;
-	struct drm_device *dev;
+	struct drm_device *ddev;
 	int ret;
 
 	if (!ent)
@@ -300,28 +300,28 @@ static int radeon_pci_probe(struct pci_dev *pdev,
 	if (ret)
 		return ret;
 
-	dev = drm_dev_alloc(&kms_driver, &pdev->dev);
-	if (IS_ERR(dev))
-		return PTR_ERR(dev);
+	ddev = drm_dev_alloc(&kms_driver, &pdev->dev);
+	if (IS_ERR(ddev))
+		return PTR_ERR(ddev);
 
 	ret = pci_enable_device(pdev);
 	if (ret)
 		goto err_free;
 
-	pci_set_drvdata(pdev, dev);
+	pci_set_drvdata(pdev, ddev);
 
-	ret = drm_dev_register(dev, ent->driver_data);
+	ret = drm_dev_register(ddev, ent->driver_data);
 	if (ret)
 		goto err_agp;
 
-	radeon_fbdev_setup(dev->dev_private);
+	radeon_fbdev_setup(ddev->dev_private);
 
 	return 0;
 
 err_agp:
 	pci_disable_device(pdev);
 err_free:
-	drm_dev_put(dev);
+	drm_dev_put(ddev);
 	return ret;
 }