drm: sti: Provide ddc symlink in hdmi connector sysfs directory

Use the ddc pointer provided by the generic connector.
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/510765aff8ef99683aa2da48bd08004376b1980a.1564161140.git.andrzej.p@collabora.com

drivers/gpu/drm/sti/sti_hdmi.c

@@ -1287,8 +1287,10 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
 
 	drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
 
-	drm_connector_init(drm_dev, drm_connector,
-			&sti_hdmi_connector_funcs, DRM_MODE_CONNECTOR_HDMIA);
+	drm_connector_init_with_ddc(drm_dev, drm_connector,
+				    &sti_hdmi_connector_funcs,
+				    DRM_MODE_CONNECTOR_HDMIA,
+				    hdmi->ddc_adapt);
 	drm_connector_helper_add(drm_connector,
 			&sti_hdmi_connector_helper_funcs);