ASoC: soc-core: merge snd_soc_add_dai_link() and soc_bind_dai_link()

We don't need to separete snd_soc_add_dai_link() and
soc_bind_dai_link() anymore. Let's merge these.

One note is that before this patch, it adds list (A)
eventhough if it had dai_link->ignore (1), or already bounded dai_link (2).
But I guess it is wrong. This patch also solve this issue.

/* BEFORE */
	int soc_bind_dai_link(...)
	{
		...
(1)		if (dai_link->ignore)
			return 0;

(2)		if (soc_is_dai_link_bound(...))
			return 0;
		...
	}

	int snd_soc_add_dai_link(...)
	{
		...
=>		ret = soc_bind_dai_link(...);
=>		if (ret < 0)
=>			return ret;

(A)		list_add_tail(&dai_link->list, &card->dai_link_list);
		...
	}

/* AFTER */

	int snd_soc_add_dai_link(...)
	{
		...
(1)		if (dai_link->ignore)
			return 0;

(2)		if (soc_is_dai_link_bound(...))
			return 0;
		...
(A)		list_add_tail(&dai_link->list, &card->dai_link_list);
		return 0;
	}

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87r22lhkx8.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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