ASoC: soc-core: dai_link check under soc_dpcm_debugfs_add()

ASoC: soc-core: dai_link check under soc_dpcm_debugfs_add()

soc_dpcm_debugfs_add(rtd) is checking rtd->dai_link pointer,
but, rtd->dai_link->dynamic have been already checked before calling it.

	static int soc_probe_link_dais(...) {
		dai_link = rtd->dai_link;
		...
=>		if (dai_link->dynamic)
=>			soc_dpcm_debugfs_add(rtd);
		...
	}

	void soc_dpcm_debugfs_add(rtd)
	{
=>		if (!rtd->dai_link)
			return;
		...
	}

These pointer checks are strange/pointless.
This patch checks dai_link->dynamic under soc_dpcm_debugfs_add().

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/874l2tahnq.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>