IB/mlx5: Fix error return code in init_one()

Fix to return a negative error code from the error handling case
instead of 0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Roland Dreier <roland@purestorage.com>
1 file changed