RDMA/netlink: Remove CAP_NET_RAW check when dump a raw QP

When dumping QPs bound to a counter, raw QPs should be allowed to dump
without the CAP_NET_RAW privilege. This is consistent with what "rdma res
show qp" does.

Fixes: c4ffee7c

 ("RDMA/netlink: Implement counter dumpit calback")
Link: https://lore.kernel.org/r/20200727095828.496195-1-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@nvidia.com>