ASoC: Remove unnecessary casts of private_data

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/davinci/davinci-pcm.c b/sound/soc/davinci/davinci-pcm.c
index 2dc406f..def454e 100644
--- a/sound/soc/davinci/davinci-pcm.c
+++ b/sound/soc/davinci/davinci-pcm.c
@@ -800,7 +800,7 @@
 		dma_free_writecombine(pcm->card->dev, buf->bytes,
 				      buf->area, buf->addr);
 		buf->area = NULL;
-		iram_dma = (struct snd_dma_buffer *)buf->private_data;
+		iram_dma = buf->private_data;
 		if (iram_dma) {
 			sram_free(iram_dma->area, iram_dma->bytes);
 			kfree(iram_dma);