net/mlx5: MPFS, add support for dynamic enable/disable

net/mlx5: MPFS, add support for dynamic enable/disable

MPFS (Multi PF Switch) is enabled by default in Multi-Host environments,
the driver keeps a list of desired unicast mac addresses of all vports
(vfs/Sfs) and applied to HW via L2_table FW command.

Add API to dynamically apply the list of MACs to HW when needed for next
patches, to utilize this new API in devlink eswitch active/in-active uAPI.

Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Adithya Jayachandran <ajayachandra@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://patch.msgid.link/20251108070404.1551708-3-saeed@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>