drm/panel: simple: Add Powertip PH800480T013 drm_display_mode flags

Add missing drm_display_mode DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC
flags. Those are used by various bridges in the pipeline to correctly
configure its sync signals polarity.

Fixes: d69de69 ("drm/panel: simple: Add Powertip PH800480T013 panel")
Signed-off-by: Marek Vasut <[email protected]>
Reviewed-by: Sam Ravnborg <[email protected]>
Signed-off-by: Neil Armstrong <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: Marek Vasut

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

@@ -3110,6 +3110,7 @@ static const struct drm_display_mode powertip_ph800480t013_idf02_mode = {
 	.vsync_start = 480 + 49,
 	.vsync_end = 480 + 49 + 2,
 	.vtotal = 480 + 49 + 2 + 22,
+	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
 };
 
 static const struct panel_desc powertip_ph800480t013_idf02  = {