RDMA/core: Create and destroy rdma_counter using rdma_zalloc_drv_obj()

Change rdma_counter allocation to use rdma_zalloc_drv_obj() instead of,
explicitly allocating at core, in order to be contained inside driver
specific structures.

Adjust all drivers that use it to have their containing structure, and
add driver specific initialization operation.

This change is needed to allow upcoming patches to implement
optional-counters binding whereas inside each driver specific counter
struct his bound optional-counters will be maintained.

Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Link: https://patch.msgid.link/a5a484f421fc2e5595158e61a354fba43272b02d.1741875070.git.leon@kernel.org


Signed-off-by: Leon Romanovsky <leon@kernel.org>