remoteproc: imx_rproc: Slightly simplify code in 'imx_rproc_probe()'

We can return directly at the beginning of the function and save the 'err'
label.
We can also explicitly return 0 when the probe succeed.

Signed-off-by: Christophe JAILLET <[e-mail]>
Signed-off-by: Bjorn Andersson <[e-mail]>

drivers/remoteproc/imx_rproc.c

···
 	/* set some other name then imx */
 	rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,
 			    NULL, sizeof(*priv));
-	if (!rproc) {
-		ret = -ENOMEM;
-		goto err;
-	}
+	if (!rproc)
+		return -ENOMEM;
 
 	dcfg = of_device_get_match_data(dev);
 	if (!dcfg) {
···
 		goto err_put_clk;
 	}
 
-	return ret;
+	return 0;
 
 err_put_clk:
 	clk_disable_unprepare(priv->clk);
 err_put_rproc:
 	rproc_free(rproc);
-err:
+
 	return ret;
 }