drm/tegra: Start connectors with correct DPMS mode

A connector's DPMS mode isn't initialized by default, therefore using a
default of 0 (DRM_MODE_DPMS_ON). This can cause problems in that the DRM
core won't explicitly turn on a connector because it thinks that it is
already on.
Signed-off-by: NThierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/output.c

@@ -265,6 +265,7 @@ int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
 	drm_connector_init(drm, &output->connector, &connector_funcs,
 			   connector);
 	drm_connector_helper_add(&output->connector, &connector_helper_funcs);
+	output->connector.dpms = DRM_MODE_DPMS_OFF;
 
 	drm_encoder_init(drm, &output->encoder, &encoder_funcs, encoder);
 	drm_encoder_helper_add(&output->encoder, &encoder_helper_funcs);