drm/exynos: Fix de-registration ordering

'exynos_drm_pdev' was not getting unregistered if platform_driver_register()
failed. Fix the ordering to allow this. This also fixes the below warning by
moving the #endif macro. While at it also fix the ordering in the exit function
so that de-registration happens in opposite order of registration.
drivers/gpu/drm/exynos/exynos_drm_drv.c:768:1: warning: label
'err_unregister_pd' defined but not used [-Wunused-label]
Signed-off-by: NSachin Kamat <sachin.kamat@samsung.com>
Signed-off-by: NInki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/exynos_drm_drv.c

@@ -765,24 +765,24 @@ static int exynos_drm_init(void)
 
 	return 0;
 
-err_unregister_pd:
-	platform_device_unregister(exynos_drm_pdev);
-
 err_remove_vidi:
 #ifdef CONFIG_DRM_EXYNOS_VIDI
 	exynos_drm_remove_vidi();
+
+err_unregister_pd:
 #endif
+	platform_device_unregister(exynos_drm_pdev);
 
 	return ret;
 }
 
 static void exynos_drm_exit(void)
 {
+	platform_driver_unregister(&exynos_drm_platform_driver);
 #ifdef CONFIG_DRM_EXYNOS_VIDI
 	exynos_drm_remove_vidi();
 #endif
 	platform_device_unregister(exynos_drm_pdev);
-	platform_driver_unregister(&exynos_drm_platform_driver);
 }
 
 module_init(exynos_drm_init);