i40iw: delete some stray tabs

These lines were indented too far by mistake.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NLeon Romanovsky <leonro@mellanox.com>
Acked-by: NShiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>