ASoC: soc-pcm: unpack dpcm_init_runtime_hw()

dpcm_init_runtime_hw() is now just verbose function.
This patch unpacks it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87r1l9vsh4.wl-kuninori.morimoto.gx@renesas.com


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