drm/arc: Remove redundant calls to drm_connector_register_all()

Up to now, the recommendation was for drivers to call drm_dev_register()
followed by drm_connector_register_all(). Now that
drm_connector_register() is safe against multiple invocations, we can
move drm_connector_register_all() to drm_dev_register() and not suffer
from any backwards compatibility issues with drivers not following the
more rigorous init ordering.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Cc: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1466151923-1572-3-git-send-email-chris@chris-wilson.co.uk

drivers/gpu/drm/arc/arcpgu_drv.c

@@ -211,15 +211,8 @@ static int arcpgu_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_unload;
 
-	ret = drm_connector_register_all(drm);
-	if (ret)
-		goto err_unregister;
-
 	return 0;
 
-err_unregister:
-	drm_dev_unregister(drm);
-
 err_unload:
 	arcpgu_unload(drm);
 
@@ -233,7 +226,6 @@ static int arcpgu_remove(struct platform_device *pdev)
 {
 	struct drm_device *drm = platform_get_drvdata(pdev);
 
-	drm_connector_unregister_all(drm);
 	drm_dev_unregister(drm);
 	arcpgu_unload(drm);
 	drm_dev_unref(drm);