drm/atomic: rip out unnecessary locking checks

For async commit, it is *intentional* that those locks are not held.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_atomic_helper.c

@@ -1006,8 +1006,6 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
 		if (!crtc)
 			continue;
 
-		WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
-
 		funcs = crtc->helper_private;
 
 		if (!funcs || !funcs->atomic_begin)
@@ -1023,8 +1021,6 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
 		if (!plane)
 			continue;
 
-		WARN_ON(!drm_modeset_is_locked(&plane->mutex));
-
 		funcs = plane->helper_private;
 
 		if (!funcs || !funcs->atomic_update)