net/mlx5: SF, Fix error return code in mlx5_sf_dev_probe()

Fix to return negative error code -ENOMEM from the ioremap() error
handling case instead of 0, as done elsewhere in this function.

Fixes: 1958fc2 ("net/mlx5: SF, Add auxiliary device driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/sf/dev/driver.c

@@ -37,6 +37,7 @@ static int mlx5_sf_dev_probe(struct auxiliary_device *adev, const struct auxilia
 	mdev->iseg = ioremap(mdev->iseg_base, sizeof(*mdev->iseg));
 	if (!mdev->iseg) {
 		mlx5_core_warn(mdev, "remap error\n");
+		err = -ENOMEM;
 		goto remap_err;
 	}