Ah, I think I misunderstood you. I have added this id to my config. <string>pci14e4,16b5</string> I think that's right.
Name: ethernet
Type: Ethernet Controller
Bus: PCI
Vendor ID: 0x14e4
Device ID: 0x16b5
Subsystem Vendor ID: 0x1025
Subsystem ID: 0x0743
Revision ID: 0x0010
Link Width: x1
BSD name: en1
Kext name: AppleBCM5701Ethernet.kext
Location: /System/Library/Extensions/IONetworkingFamily.kext/Contents/PlugIns/AppleBCM5701Ethernet.kext
mDNS offload capable: b8:88:e3:ac:da:a7
Version: 3.6.9b2