drm/imx: parallel-display: use correct connector enum

The imx parrallel display exposes a, well, display parallel interface.
Use the correct enum, instead of disguising the thing as a VGA connector.

Signed-off-by: Lucas Stach <[e-mail]>
Signed-off-by: Philipp Zabel <[e-mail]>

drivers/gpu/drm/imx/parallel-display.c

···
 				&imx_pd_connector_helper_funcs);
 		drm_connector_init(drm, &imxpd->connector,
 				   &imx_pd_connector_funcs,
-				   DRM_MODE_CONNECTOR_VGA);
+				   DRM_MODE_CONNECTOR_DPI);
 	}
 
 	if (imxpd->panel)