mailbox: arm_mhu_db: Remove redundant dev_err call in mhu_db_probe()

There is a error message within devm_ioremap_resource
already, so remove the dev_err call to avoid redundant
error message.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Qiheng Lin <linqiheng@huawei.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>

drivers/mailbox/arm_mhu_db.c

@@ -278,10 +278,8 @@ static int mhu_db_probe(struct amba_device *adev, const struct amba_id *id)
 		return -ENOMEM;
 
 	mhu->base = devm_ioremap_resource(dev, &adev->res);
-	if (IS_ERR(mhu->base)) {
-		dev_err(dev, "ioremap failed\n");
+	if (IS_ERR(mhu->base))
 		return PTR_ERR(mhu->base);
-	}
 
 	chans = devm_kcalloc(dev, max_chans, sizeof(*chans), GFP_KERNEL);
 	if (!chans)