ASoC: simple-card-utils.c: add missing dlc->of_node

commit 90de551 ("ASoC: simple-card-utils.c: enable multi Component
support") added muiti Component support, but was missing to add
dlc->of_node. Because of it, Sound device list will indicates strange
name if it was DPCM connection and driver supports dai->driver->dai_args,
like below

	> aplay -l
	card X: sndulcbmix [xxxx], device 0: fe.(null).rsnd-dai.0 (*) []
	...                                     ^^^^^^

It will be fixed by this patch

	> aplay -l
	card X: sndulcbmix [xxxx], device 0: fe.sound@ec500000.rsnd-dai.0 (*) []
	...                                     ^^^^^^^^^^^^^^

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://patch.msgid.link/87ikpp2rtb.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/generic/simple-card-utils.c

@@ -1092,6 +1092,7 @@ int graph_util_parse_dai(struct device *dev, struct device_node *ep,
 	args.np = ep;
 	dai = snd_soc_get_dai_via_args(&args);
 	if (dai) {
+		dlc->of_node  = node;
 		dlc->dai_name = snd_soc_dai_name_get(dai);
 		dlc->dai_args = snd_soc_copy_dai_args(dev, &args);
 		if (!dlc->dai_args)