ASoC: soc-core.c: fixup snd_soc_of_get_dai_link_cpus()

ASoC: soc-core.c: fixup snd_soc_of_get_dai_link_cpus()

commit 790a95e71b1256b ("ASoC: Introduce snd_soc_of_get_dai_link_cpus")
adds new snd_soc_of_get_dai_link_cpus(), but it is using
"codec" everywhere. It is very strange, and is issue when error case.
It should call cpu instead of codec in error case.
This patch tidyup it.

Fixes: 790a95e71b1256b ("ASoC: Introduce snd_soc_of_get_dai_link_cpus")
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/87zgi5p7k1.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>