drm/panel: simple: add bus flags for Innolux AT043TN24

For LCD interface controllers that support configuring polarity of
pixel clock and data enable signal, specify bus flags in the panel
descriptor.
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/20171011125958.23064-2-p.zabel@pengutronix.de

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

@@ -1033,6 +1033,7 @@ static const struct panel_desc innolux_at043tn24 = {
 		.height = 54,
 	},
 	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_POSEDGE,
 };
 
 static const struct drm_display_mode innolux_at070tn92_mode = {