net: mdio: Remove redundant dev_err call in mdio_mux_iproc_probe()

There is a error message within devm_ioremap_resource
already, so remove the dev_err call to avoid redundant
error message.
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: NGuobin Huang <huangguobin4@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/mdio/mdio-mux-bcm-iproc.c

@@ -197,10 +197,8 @@ static int mdio_mux_iproc_probe(struct platform_device *pdev)
 		res->end = res->start + MDIO_REG_ADDR_SPACE_SIZE - 1;
 	}
 	md->base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(md->base)) {
-		dev_err(&pdev->dev, "failed to ioremap register\n");
+	if (IS_ERR(md->base))
 		return PTR_ERR(md->base);
-	}
 
 	md->mii_bus = devm_mdiobus_alloc(&pdev->dev);
 	if (!md->mii_bus) {