RDMA/counter: Prevent QP counter manual binding in auto mode

If auto mode is configured, manual counter allocation and QP bind is not
allowed.

Fixes: 1bd8e0a9 ("RDMA/counter: Allow manual mode configuration support")
Link: https://lore.kernel.org/r/20190916071154.20383-3-leon@kernel.org


Signed-off-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>