net/mlx5: Add priorities for counters in RDMA namespaces

[ Upstream commit b8dfed63 ]

Add additional flow steering priorities in the RDMA namespace.
This allows adding flow counters to count filtered RDMA traffic and then
continue processing in the regular RDMA steering flow.

Signed-off-by: Aharon Landau <aharonl@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Stable-dep-of: c08d3e62 ("net/mlx5: Fix RDMA TX steering prio")
Signed-off-by: Sasha Levin <sashal@kernel.org>