drm/panel: novatek-nt39016: drop use of legacy drm_bus_flags

Drop use of the legacy drm_bus_flags member and use the more descriptive
_SAMPLE_ variant.
No functional change.

Note:
DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE = DRM_BUS_FLAG_PIXDATA_NEGEDGE
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200630180545.1132217-5-sam@ravnborg.org

drivers/gpu/drm/panel/panel-novatek-nt39016.c

@@ -357,7 +357,7 @@ static const struct nt39016_panel_info kd035g6_info = {
 	.width_mm = 71,
 	.height_mm = 53,
 	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
-	.bus_flags = DRM_BUS_FLAG_PIXDATA_NEGEDGE,
+	.bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE,
 };
 
 static const struct of_device_id nt39016_of_match[] = {