Augustin Cavalier 41faeb1df9 net_interface & datalink: Fix MTU handling.
The device is what actually controls the MTU, and it has its own
field for this, so having a second one just meant the MTU never
got updated after startup.

Remove the "mtu" field from the interface, use the "device->mtu" directly,
and then actually invoke device->module->set_mtu when updating.
2022-05-27 16:36:12 -04:00
..