RTL8365MB_L2_UC_D5_DA_BLOCK_MSK
uc->da_block = FIELD_GET(RTL8365MB_L2_UC_D5_DA_BLOCK_MSK, data[5]);
data[5] |= FIELD_PREP(RTL8365MB_L2_UC_D5_DA_BLOCK_MSK, uc->da_block);