drm/fsl-dcu: remove unneeded 'ret' assignment

When devm_kzalloc() fails there is no need to assign an error code
to the 'ret' variable as it will not be used after jumping to the
'err_node_put' label, so just remove the assignment.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
Signed-off-by: Stefan Agner <stefan@agner.ch>

drivers/gpu/drm/fsl-dcu/fsl_tcon.c

@@ -72,10 +72,8 @@ struct fsl_tcon *fsl_tcon_init(struct device *dev)
 		return NULL;
 
 	tcon = devm_kzalloc(dev, sizeof(*tcon), GFP_KERNEL);
-	if (!tcon) {
-		ret = -ENOMEM;
+	if (!tcon)
 		goto err_node_put;
-	}
 
 	ret = fsl_tcon_init_regmap(dev, tcon, np);
 	if (ret) {