Want rx-only DLPI promiscuous modes
The MAC layer already has a notion of a given mac callback only being promiscuous when receiving traffic. We should plumb this through to the DLPI layer.
This is an upstream of Joyent's OS-2781 - https://smartos.org/bugview/OS-2781
This will help with #13738 that is restoring a functioning virtual e1000 network interface for bhyve.