ASoC: soc-dai.c: use helper function

Current ASoC has many helper function.
This patch use it.

Link: https://lore.kernel.org/all/6f047ec5-4055-761d-c1ea-c2d0b606e53a@linux.intel.com/


Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87h6w7ea2a.wl-kuninori.morimoto.gx@renesas.com


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