ADM5120_DMA_RINGEND
sc->sc_txhdescs[ADMSW_NTXHDESC - 1].data |= ADM5120_DMA_RINGEND;
sc->sc_txldescs[ADMSW_NTXLDESC - 1].data |= ADM5120_DMA_RINGEND;
desc->data |= ADM5120_DMA_RINGEND;
__desc->data |= ADM5120_DMA_RINGEND; \
__desc->data |= ADM5120_DMA_RINGEND; \