drm/omap: dsi: Fix missing of_platform_depopulate()

We're missing a call to of_platform_depopulate() on errors for dsi.
Looks like dss is already doing this.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181106152802.38599-1-tony@atomide.com

drivers/gpu/drm/omapdrm/dss/dsi.c

@@ -5429,15 +5429,19 @@ static int dsi_probe(struct platform_device *pdev)
 	}
 
 	r = of_platform_populate(dev->of_node, NULL, NULL, dev);
-	if (r)
+	if (r) {
 		DSSERR("Failed to populate DSI child devices: %d\n", r);
+		goto err_uninit_output;
+	}
 
 	r = component_add(&pdev->dev, &dsi_component_ops);
 	if (r)
-		goto err_uninit_output;
+		goto err_of_depopulate;
 
 	return 0;
 
+err_of_depopulate:
+	of_platform_depopulate(dev);
 err_uninit_output:
 	dsi_uninit_output(dsi);
 err_pm_disable: