IB/mlx5: Fix steering rule of drop and count

There are two flow rule destinations: QP and packet. While users are
setting DROP packet rule, the QP should not be set as a destination.

Fixes: 3b3233fb ("IB/mlx5: Add flow counters binding support")
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Raed Salem <raeds@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20191212091214.315005-4-leon@kernel.org


Signed-off-by: Doug Ledford <dledford@redhat.com>