net/mlx5: qos: Add an explicit 'dev' to vport trace calls

vport qos trace calls used vport->dev implicitly as the device to which
the command was sent (and thus the device logged in traces).
But that will no longer be the case for cross-esw scheduling, where the
commands have to be sent to the group esw device instead.

This commit corrects that.

Signed-off-by: Cosmin Ratiu <cratiu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>