net/mlx5: Lag, move devcom registration to LAG layer

net/mlx5: Lag, move devcom registration to LAG layer

Move the devcom registration for the HCA_PORTS component from the core
initialization path into the LAG logic. This better reflects the logical
ownership of this component and ensures proper alignment with the LAG
lifecycle.

Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/1757940070-618661-3-git-send-email-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>