ASoC: rsnd: use pcm_dmaengine code

rsnd is implementing own DMAEngine code, but we can replace it with
pcm_dmaengine code, because these are almost same.
Let's use existing and stable code.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/87cymvk3t5.wl-kuninori.morimoto.gx@renesas.com


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