ASoC: dsp - remove unused function is_be_supported()

For SQUASH

Signed-off-by: Liam Girdwood <lrg@ti.com>
diff --git a/sound/soc/soc-dsp.c b/sound/soc/soc-dsp.c
index f968083..6916a09 100644
--- a/sound/soc/soc-dsp.c
+++ b/sound/soc/soc-dsp.c
@@ -39,18 +39,6 @@
 int soc_pcm_trigger(struct snd_pcm_substream *, int);
 int soc_pcm_bespoke_trigger(struct snd_pcm_substream *, int);
 
-static int is_be_supported(struct snd_soc_pcm_runtime *rtd, const char *link)
-{
-	struct snd_soc_dsp_link *dsp = rtd->dai_link->dsp_link;
-	int i;
-
-	for (i= 0; i < dsp->num_be; i++) {
-		if(!strcmp(dsp->supported_be[i], link))
-			return 1;
-	}
-	return 0;
-}
-
 static inline int be_connect(struct snd_soc_pcm_runtime *fe,
 		struct snd_soc_pcm_runtime *be, int stream)
 {