Replace drm_crtc_helper_set_config() by drm_atomic_helper_set_config().
All drivers have now been converted to use ->atomic_check() to set the
atomic state, therefore the atomic mode setting helpers can be used.
Signed-off-by: Thierry Reding <treding@nvidia.com>
 
 static const struct drm_crtc_funcs tegra_crtc_funcs = {
        .page_flip = tegra_dc_page_flip,
-       .set_config = drm_crtc_helper_set_config,
+       .set_config = drm_atomic_helper_set_config,
        .destroy = tegra_dc_destroy,
        .reset = tegra_crtc_reset,
        .atomic_duplicate_state = tegra_crtc_atomic_duplicate_state,