EFX_MCAST_HASH_ENTRIES
bit = crc & (EFX_MCAST_HASH_ENTRIES - 1);
u8 byte[EFX_MCAST_HASH_ENTRIES / 8];
efx_oword_t oword[EFX_MCAST_HASH_ENTRIES / sizeof(efx_oword_t) / 8];