drm/panel: novatek,nt39016: Reorder calls in probe

The drm_panel_of_backlight() function must be called after
drm_panel_init(), according to the function's documentation; otherwise
the backlight won't be properly initialized.
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20200820121256.32037-2-paul@crapouillou.net

drivers/gpu/drm/panel/panel-novatek-nt39016.c

@@ -285,6 +285,9 @@ static int nt39016_probe(struct spi_device *spi)
 		return PTR_ERR(panel->map);
 	}
 
+	drm_panel_init(&panel->drm_panel, dev, &nt39016_funcs,
+		       DRM_MODE_CONNECTOR_DPI);
+
 	err = drm_panel_of_backlight(&panel->drm_panel);
 	if (err) {
 		if (err != -EPROBE_DEFER)
@@ -292,9 +295,6 @@ static int nt39016_probe(struct spi_device *spi)
 		return err;
 	}
 
-	drm_panel_init(&panel->drm_panel, dev, &nt39016_funcs,
-		       DRM_MODE_CONNECTOR_DPI);
-
 	drm_panel_add(&panel->drm_panel);
 
 	return 0;