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 <[e-mail]>
Signed-off-by: Paul Cercueil <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

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

···
 		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)
 			dev_err(dev, "Failed to get backlight handle\n");
 		return err;
 	}
-
-	drm_panel_init(&panel->drm_panel, dev, &nt39016_funcs,
-		       DRM_MODE_CONNECTOR_DPI);
 
 	drm_panel_add(&panel->drm_panel);