net: mdio: mux-mmioreg: Switch to use dev_err_probe() helper

dev_err() can be replace with dev_err_probe() which will check if error
code is -EPROBE_DEFER.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220915065043.665138-2-yangyingliang@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/mdio/mdio-mux-mmioreg.c

@@ -159,12 +159,9 @@ static int mdio_mux_mmioreg_probe(struct platform_device *pdev)
 	ret = mdio_mux_init(&pdev->dev, pdev->dev.of_node,
 			    mdio_mux_mmioreg_switch_fn,
 			    &s->mux_handle, s, NULL);
-	if (ret) {
-		if (ret != -EPROBE_DEFER)
-			dev_err(&pdev->dev,
-				"failed to register mdio-mux bus %pOF\n", np);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "failed to register mdio-mux bus %pOF\n", np);
 
 	pdev->dev.platform_data = s;