ASoC: soc-pcm: remove unneeded !rtd->dai_link check

rtd->dai_link is setuped at soc_new_pcm_runtime(),
thus "rtd->dai_link == NULL" is never happen.
This patch removes unneeded !rtd->dai_link check
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87blbtuoar.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-pcm.c

@@ -165,9 +165,6 @@ static const struct file_operations dpcm_state_fops = {
 
 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
 {
-	if (!rtd->dai_link)
-		return;
-
 	if (!rtd->dai_link->dynamic)
 		return;