drm/panel: raydium-rm67191: drop use of legacy drm_bus_flags

Use the non-legacy drm_bus_flag _SAMPLE_ member.
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: Robert Chiras <robert.chiras@nxp.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200630180545.1132217-4-sam@ravnborg.org

drivers/gpu/drm/panel/panel-raydium-rm67191.c

@@ -192,7 +192,7 @@ static const u32 rad_bus_formats[] = {
 };
 
 static const u32 rad_bus_flags = DRM_BUS_FLAG_DE_LOW |
-				 DRM_BUS_FLAG_PIXDATA_NEGEDGE;
+				 DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE;
 
 struct rad_panel {
 	struct drm_panel panel;