drm/bridge: ti-sn65dsi86: Convert to drm_of_get_data_lanes_count

Convert driver to use this new helper to standardize
OF "data-lanes" parsing.
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
To: dri-devel@lists.freedesktop.org
Link: https://patchwork.freedesktop.org/patch/msgid/20220524010522.528569-9-marex@denx.de

drivers/gpu/drm/bridge/ti-sn65dsi86.c

@@ -1142,8 +1142,8 @@ static void ti_sn_bridge_parse_lanes(struct ti_sn65dsi86 *pdata,
 	 * mappings that the hardware supports.
 	 */
 	endpoint = of_graph_get_endpoint_by_regs(np, 1, -1);
-	dp_lanes = of_property_count_u32_elems(endpoint, "data-lanes");
-	if (dp_lanes > 0 && dp_lanes <= SN_MAX_DP_LANES) {
+	dp_lanes = drm_of_get_data_lanes_count(endpoint, 1, SN_MAX_DP_LANES);
+	if (dp_lanes > 0) {
 		of_property_read_u32_array(endpoint, "data-lanes",
 					   lane_assignments, dp_lanes);
 		of_property_read_u32_array(endpoint, "lane-polarities",