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 3e98554c2e30eb0 ("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: 3e98554c2e30eb0 ("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>