OMAP: DSS: Taal: fix error returns in taal_probe()

The workqueue creation error branch attempted to destroy a NULL wq,
and, in turn, a failed registration does not destroy the newly created
workqueue.

The problem was reported by a static analysis tool.
Signed-off-by: NAaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@nokia.com>

drivers/video/omap2/displays/panel-taal.c

@@ -510,7 +510,7 @@ static int taal_probe(struct omap_dss_device *dssdev)
 	if (td->esd_wq == NULL) {
 		dev_err(&dssdev->dev, "can't create ESD workqueue\n");
 		r = -ENOMEM;
-		goto err2;
+		goto err1;
 	}
 	INIT_DELAYED_WORK_DEFERRABLE(&td->esd_work, taal_esd_work);
 
@@ -528,7 +528,7 @@ static int taal_probe(struct omap_dss_device *dssdev)
 			&taal_bl_ops);
 	if (IS_ERR(bldev)) {
 		r = PTR_ERR(bldev);
-		goto err1;
+		goto err2;
 	}
 
 	td->bldev = bldev;