[media] coda: drop dma_sync_single_for_device in coda_bitstream_queue

Issuing a cache flush for the whole bitstream buffer is not optimal in the first
place when only a part of it was written. But given that the buffer is mapped in
writecombine mode, it is not needed at all.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Ian Molton <imolton@ad-holdings.co.uk>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/coda/coda-bit.c

@@ -181,10 +181,6 @@ static int coda_bitstream_queue(struct coda_ctx *ctx,
 	if (n < src_size)
 		return -ENOSPC;
 
-	dma_sync_single_for_device(&ctx->dev->plat_dev->dev,
-				   ctx->bitstream.paddr, ctx->bitstream.size,
-				   DMA_TO_DEVICE);
-
 	src_buf->v4l2_buf.sequence = ctx->qsequence++;
 
 	return 0;