Merge branch 'mlx5-support-setting-a-parent-for-a-devlink-rate-node'

Tariq Toukan says:

====================
mlx5: Support setting a parent for a devlink rate node

This series by Carolina adds mlx5 support for the setting of a parent to
devlink rate nodes.

By introducing a hierarchical level to scheduling nodes, these changes
allow for more granular control over bandwidth allocation and isolation
of Virtual Functions.

Function renaming for parent setting on leafs:
- net/mlx5: Rename devlink rate parent set function for leaf nodes

Add support for hierarchy level tracking:
- net/mlx5: Introduce hierarchy level tracking on scheduling nodes
- net/mlx5: Preserve rate settings when creating a rate node

Support setting parent for rate nodes:
- net/mlx5: Add support for setting parent of nodes
====================

Link: https://patch.msgid.link/1741642016-44918-1-git-send-email-tariqt@nvidia.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>