IFM_50G_KR2
[MCX_ETHER_CAP_50G_KR2] = { IFM_50G_KR2, IF_Gbps(50) },
{ IFM_ETHER | IFM_50G_KR2 | IFM_FDX, "50GBASE-KR2" }, \
{ IFM_ETHER | IFM_50G_KR2, IF_Gbps(50) }, \