net/mlx5: Remove redundant bw_share minimal value assignment

net/mlx5: Remove redundant bw_share minimal value assignment

Remove unnecessary logic that sets bw_share to minimal value, when
parent has bw_share configured but nodes don't have min_rate.

This check is redundant because the parent bandwidth acts as the upper
bound regardless, and the firmware always enforces the topmost
bandwidth constraint.

Signed-off-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/1763415729-1238421-4-git-send-email-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>