ASoC: soc-core: don't use discriminatory terms on snd_soc_runtime_get_dai_fmt()

snd_soc_runtime_get_dai_fmt() is using discriminatory terms.
This patch fixup it.

Fixes: ba9e82a1 ("ASoC: soc-core: add snd_soc_runtime_get_dai_fmt()")
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/874ke9dxkp.wl-kuninori.morimoto.gx@renesas.com


Signed-off-by: Mark Brown <broonie@kernel.org>