dmaengine: nbpfaxi: update the driver comments

driver comment refers to DMA_PAUSE which needs to be updated to
.device_pause

Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/nbpfaxi.c

@@ -504,7 +504,7 @@ static int nbpf_prep_one(struct nbpf_link_desc *ldesc,
 	 * pauses DMA and reads out data received via DMA as well as those left
 	 * in the Rx FIFO. For this to work with the RAM side using burst
 	 * transfers we enable the SBE bit and terminate the transfer in our
-	 * DMA_PAUSE handler.
+	 * .device_pause handler.
 	 */
 	mem_xfer = nbpf_xfer_ds(chan->nbpf, size);