[PATCH net v2 2/2] net: stmmac: Consider Tx VLAN offload tag length for maxSDU

[Ng, Boon Khai]

> Please make sure to CC "Ng, Boon Khai" <boon.khai.ng at altera.com> who wrote
> the VLAN support (IIRC).

Working closely with Rohan on this.