ASoC: audio-graph-card2-custom-sample.dtsi: use card->name to avoid long name

Current Card2 Custom Sample will be too long Card name, and be error

	audio-graph-card2-custom-sample audio-graph-card2-custom-sample \
		ASoC: driver name too long \
		audio-graph-card2-custom-sample' -> 'audio-graph-car'

This patch uses short name to avoid it
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87bkke7qzf.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/generic/audio-graph-card2-custom-sample.c

@@ -151,6 +151,9 @@ static int custom_probe(struct platform_device *pdev)
 	simple_priv		= &custom_priv->simple_priv;
 	simple_priv->ops	= &custom_ops; /* customize dai_link ops */
 
+	/* "audio-graph-card2-custom-sample" is too long */
+	simple_priv->snd_card.name = "card2-custom";
+
 	/* use audio-graph-card2 parsing with own custom hooks */
 	ret = audio_graph2_parse_of(simple_priv, dev, &custom_hooks);
 	if (ret < 0)