RDMA/counter: Only bind user QPs in auto mode

In auto mode only bind user QPs to a dynamic counter, since this feature
is mainly used for system statistic and diagnostic purpose, while there's
no need to counter kernel QPs so far.

Fixes: 99fa331d ("RDMA/counter: Add "auto" configuration mode support")
Link: https://lore.kernel.org/r/20200702082933.424537-3-leon@kernel.org


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