drm/panel: simple: Fix the lt089ac29000 bus_format

The lt089ac29000 panel is an LVDS panel, not a DPI one. Fix the
definition to reflect this fact.

v10:
* Add changelog to the commit message

v8 -> v9:
* No changes

v7:
* New patch

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200128135514.108171-12-boris.brezillon@collabora.com

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

@@ -3139,7 +3139,7 @@ static const struct panel_desc toshiba_lt089ac29000 = {
 		.width = 194,
 		.height = 116,
 	},
-	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA,
 	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };