ASoC: wm_adsp: Make use of local variables

Tidy up some instances of dereferencing to obtain things that are
already stored in local variables.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm_adsp.c

@@ -3381,7 +3381,7 @@ static int wm_adsp_compr_attach(struct wm_adsp_compr *compr)
 		return -EINVAL;
 
 	compr->buf = buf;
-	compr->buf->compr = compr;
+	buf->compr = compr;
 
 	return 0;
 }
@@ -4091,7 +4091,7 @@ int wm_adsp_compr_pointer(struct snd_compr_stream *stream,
 
 	buf = compr->buf;
 
-	if (!compr->buf || compr->buf->error) {
+	if (!buf || buf->error) {
 		snd_compr_stop_error(stream, SNDRV_PCM_STATE_XRUN);
 		ret = -EIO;
 		goto out;
@@ -4111,7 +4111,7 @@ int wm_adsp_compr_pointer(struct snd_compr_stream *stream,
 		if (buf->avail < wm_adsp_compr_frag_words(compr)) {
 			ret = wm_adsp_buffer_get_error(buf);
 			if (ret < 0) {
-				if (compr->buf->error)
+				if (buf->error)
 					snd_compr_stop_error(stream,
 							SNDRV_PCM_STATE_XRUN);
 				goto out;