net/mlx5e: Fix an IS_ERR() vs NULL check

The esw_vport_tbl_get() function returns error pointers on error.

Fixes: 96e326878fa5 ("net/mlx5e: Eswitch, Use per vport tables for mirroring")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
1 file changed