ASoC: rsnd: remove endpoint bidirectional check

DTC commit df536831d02c ("checks: add graph binding checks")
is checking endpoint bidirectional, and it is upstreamed to linux by
commit 50aafd6089 ("scripts/dtc: Update to upstream version
v1.4.6-21-g84e414b0b5bc").
Let's remove own bidirectional check

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/rcar/ssi.c

@@ -1095,11 +1095,7 @@ void rsnd_ssi_parse_hdmi_connection(struct rsnd_priv *priv,
 				    int dai_i)
 {
 	struct rsnd_dai *rdai = rsnd_rdai_get(priv, dai_i);
-	struct device_node *remote_ep;
-
-	remote_ep = of_graph_get_remote_endpoint(endpoint);
-	if (!remote_ep)
-		return;
+	struct device_node *remote_ep = of_graph_get_remote_endpoint(endpoint);
 
 	__rsnd_ssi_parse_hdmi_connection(priv, &rdai->playback, remote_ep);
 	__rsnd_ssi_parse_hdmi_connection(priv, &rdai->capture,  remote_ep);