nextdma_setconf
nextdma_setconf(esc->sc_dma, shutdown_cb, &esp_dmacb_shutdown);
nextdma_setconf(esc->sc_dma, continue_cb, &esp_dmacb_continue);
nextdma_setconf(esc->sc_dma, completed_cb, &esp_dmacb_completed);
nextdma_setconf(esc->sc_dma, cb_arg, sc);
nextdma_setconf (xsc->sc_rxdma, continue_cb, xe_dma_rx_continue);
nextdma_setconf (xsc->sc_rxdma, completed_cb, xe_dma_rx_completed);
nextdma_setconf (xsc->sc_rxdma, shutdown_cb, xe_dma_rx_shutdown);
nextdma_setconf (xsc->sc_rxdma, cb_arg, sc);
nextdma_setconf (xsc->sc_txdma, continue_cb, xe_dma_tx_continue);
nextdma_setconf (xsc->sc_txdma, completed_cb, xe_dma_tx_completed);
nextdma_setconf (xsc->sc_txdma, shutdown_cb, xe_dma_tx_shutdown);
nextdma_setconf (xsc->sc_txdma, cb_arg, sc);