drm/bridge: ti-sn65dsi83: Handle dsi_lanes == 0 as invalid

Handle empty data-lanes = < >; property, which translates to
dsi_lanes = 0 as invalid.

Fixes: ceb515ba ("drm/bridge: ti-sn65dsi83: Add TI SN65DSI83 and SN65DSI84 driver")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Marek Vasut <marex@denx.de>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220518233844.248504-1-marex@denx.de

drivers/gpu/drm/bridge/ti-sn65dsi83.c

@@ -577,7 +577,7 @@ static int sn65dsi83_parse_dt(struct sn65dsi83 *ctx, enum sn65dsi83_model model)
 	ctx->host_node = of_graph_get_remote_port_parent(endpoint);
 	of_node_put(endpoint);
 
-	if (ctx->dsi_lanes < 0 || ctx->dsi_lanes > 4) {
+	if (ctx->dsi_lanes <= 0 || ctx->dsi_lanes > 4) {
 		ret = -EINVAL;
 		goto err_put_node;
 	}