spi: sifive: Remove redundant dev_err call in sifive_spi_probe()

There is a error message within devm_ioremap_resource
already, so remove the dev_err call to avoid redundant
error message.
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-sifive.c

@@ -310,7 +310,6 @@ static int sifive_spi_probe(struct platform_device *pdev)
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	spi->regs = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(spi->regs)) {
-		dev_err(&pdev->dev, "Unable to map IO resources\n");
 		ret = PTR_ERR(spi->regs);
 		goto put_master;
 	}