ASoC: rsnd: Fix probe failure on HiHope boards due to endpoint parsing

On the HiHope boards, we have a single port with a single endpoint defined
as below:
....
        rsnd_port: port {
                rsnd_endpoint: endpoint {
                        remote-endpoint = <&dw_hdmi0_snd_in>;

                        dai-format = "i2s";
                        bitclock-master = <&rsnd_endpoint>;
                        frame-master = <&rsnd_endpoint>;

                        playback = <&ssi2>;
                };
        };
....

With commit 547b02f ("ASoC: rsnd: enable multi Component support for
Audio Graph Card/Card2"), support for multiple ports was added. This caused
probe failures on HiHope boards, as the endpoint could not be retrieved due
to incorrect device node pointers being used.

This patch fixes the issue by updating the `rsnd_dai_of_node()` and
`rsnd_dai_probe()` functions to use the correct device node pointers based
on the port names ('port' or 'ports'). It ensures that the endpoint is
properly parsed for both single and multi-port configurations, restoring
compatibility with HiHope boards.

Fixes: 547b02f ("ASoC: rsnd: enable multi Component support for Audio Graph Card/Card2")
Signed-off-by: Lad Prabhakar <[email protected]>
Acked-by: Kuninori Morimoto <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Mark Brown <[email protected]>

sound/soc/sh/rcar/core.c

@@ -1281,7 +1281,9 @@ static int rsnd_dai_of_node(struct rsnd_priv *priv, int *is_graph)
 		if (!of_node_name_eq(ports, "ports") &&
 		    !of_node_name_eq(ports, "port"))
 			continue;
-		priv->component_dais[i] = of_graph_get_endpoint_count(ports);
+		priv->component_dais[i] =
+			of_graph_get_endpoint_count(of_node_name_eq(ports, "ports") ?
+						    ports : np);
 		nr += priv->component_dais[i];
 		i++;
 		if (i >= RSND_MAX_COMPONENT) {
@@ -1493,7 +1495,8 @@ static int rsnd_dai_probe(struct rsnd_priv *priv)
 			if (!of_node_name_eq(ports, "ports") &&
 			    !of_node_name_eq(ports, "port"))
 				continue;
-			for_each_endpoint_of_node(ports, dai_np) {
+			for_each_endpoint_of_node(of_node_name_eq(ports, "ports") ?
+						  ports : np, dai_np) {
 				__rsnd_dai_probe(priv, dai_np, dai_np, 0, dai_i);
 				if (!rsnd_is_gen1(priv) && !rsnd_is_gen2(priv)) {
 					rdai = rsnd_rdai_get(priv, dai_i);