drm/panel: simple: add delays for Innolux AT043TN24

The delays between video data and backlight enable and between backlight
disable and end of video data are given as >= 160 ms in the datasheet.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Marco Franchi <marco.franchi@nxp.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171011125958.23064-3-p.zabel@pengutronix.de

drivers/gpu/drm/panel/panel-simple.c

@@ -1008,6 +1008,10 @@ static const struct panel_desc hitachi_tx23d38vm0caa = {
 		.width = 195,
 		.height = 117,
 	},
+	.delay = {
+		.enable = 160,
+		.disable = 160,
+	},
 };
 
 static const struct drm_display_mode innolux_at043tn24_mode = {