dmaengine: edma: Remove alignment constraint for memcpy

Despite the claim by the original commit adding the memcpy
support, eDMA does not have constraint on the alignment of src, dst
or length in increment mode.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/edma.c

@@ -1324,6 +1324,7 @@ static struct dma_async_tx_descriptor *edma_prep_dma_memcpy(
 	struct edma_desc *edesc;
 	struct device *dev = chan->device->dev;
 	struct edma_chan *echan = to_edma_chan(chan);
+	unsigned int width;
 
 	if (unlikely(!echan || !len))
 		return NULL;
@@ -1336,8 +1337,12 @@ static struct dma_async_tx_descriptor *edma_prep_dma_memcpy(
 
 	edesc->pset_nr = 1;
 
+	width = 1 << __ffs((src | dest | len));
+	if (width > DMA_SLAVE_BUSWIDTH_64_BYTES)
+		width = DMA_SLAVE_BUSWIDTH_64_BYTES;
+
 	ret = edma_config_pset(chan, &edesc->pset[0], src, dest, 1,
-			       DMA_SLAVE_BUSWIDTH_4_BYTES, len, DMA_MEM_TO_MEM);
+			       width, len, DMA_MEM_TO_MEM);
 	if (ret < 0)
 		return NULL;
 
@@ -1903,12 +1908,6 @@ static void edma_dma_init(struct edma_cc *ecc, struct dma_device *dma,
 
 	dma->dev = dev;
 
-	/*
-	 * code using dma memcpy must make sure alignment of
-	 * length is at dma->copy_align boundary.
-	 */
-	dma->copy_align = DMAENGINE_ALIGN_4_BYTES;
-
 	INIT_LIST_HEAD(&dma->channels);
 }