media: imx: imx7-media-csi: Rename imx7_csi_dma_start() to *_setup()

The imx7_csi_dma_start() doesn't start DMA. Rename it to
imx7_csi_dma_setup() to avoid confusion.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/imx/imx7-media-csi.c

@@ -441,7 +441,7 @@ static void imx7_csi_dma_unsetup_vb2_buf(struct imx7_csi *csi,
 	}
 }
 
-static int imx7_csi_dma_start(struct imx7_csi *csi)
+static int imx7_csi_dma_setup(struct imx7_csi *csi)
 {
 	struct imx_media_video_dev *vdev = csi->vdev;
 	int ret;
@@ -614,7 +614,7 @@ static int imx7_csi_streaming_start(struct imx7_csi *csi)
 {
 	int ret;
 
-	ret = imx7_csi_dma_start(csi);
+	ret = imx7_csi_dma_setup(csi);
 	if (ret < 0)
 		return ret;