ASoC: soc-pcm: don't indicate error message for soc_pcm_hw_free()

soc_pcm_hw_free() never fail, error message is not needed.
We can't use void function for it, because it is used
part of struct snd_pcm_ops :: hw_free.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87czw1utaj.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>