drm/sti: dpms function missing for HDMI connector

Signed-off-by: NVincent Abriou <vincent.abriou@st.com>
Acked-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org>

drivers/gpu/drm/sti/sti_hdmi.c

@@ -1054,6 +1054,7 @@ static int sti_hdmi_late_register(struct drm_connector *connector)
 }
 
 static const struct drm_connector_funcs sti_hdmi_connector_funcs = {
+	.dpms = drm_atomic_helper_connector_dpms,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.detect = sti_hdmi_connector_detect,
 	.destroy = drm_connector_cleanup,