drm/i915/connector: use MISSING_CASE instead of logging

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/bb70a05a2c20307ab67b89c4682f5afc5953fcaf.1584714939.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_connector.c

@@ -290,7 +290,7 @@ intel_attach_colorspace_property(struct drm_connector *connector)
 			return;
 		break;
 	default:
-		DRM_DEBUG_KMS("Colorspace property not supported\n");
+		MISSING_CASE(connector->connector_type);
 		return;
 	}