RDMA/core: Create and destroy counters in the ib_core

[ Upstream commit 3b023e1b680a56e84c22d43486875a5aa4c78afe ]

Move allocation and destruction of counters under ib_core responsibility

Link: https://lore.kernel.org/r/20200630101855.368895-2-leon@kernel.org


Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Stable-dep-of: acd245b1e33f ("RDMA/mlx5: Fix CC counters query for MPV")
Signed-off-by: Sasha Levin <sashal@kernel.org>