IFM_50G_KR2
vke_ifmedia_addfdx(sc, IFM_50G_KR2);
{ IFM_50G_KR2, "50GbaseKR2" }, \
{ IFM_ETHER|IFM_50G_KR2, IF_Gbps(50ULL) }, \
case IFM_50G_KR2: