pwm: sifive: Remove redundant error message

devm_ioremap_resource() already outputs an error message, so remove the
extra error message on failure.
Signed-off-by: Ding Xiang <dingxiang@cmss.chinamobile.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-sifive.c

@@ -250,10 +250,8 @@ static int pwm_sifive_probe(struct platform_device *pdev)
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	ddata->regs = devm_ioremap_resource(dev, res);
-	if (IS_ERR(ddata->regs)) {
-		dev_err(dev, "Unable to map IO resources\n");
+	if (IS_ERR(ddata->regs))
 		return PTR_ERR(ddata->regs);
-	}
 
 	ddata->clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(ddata->clk)) {