ASoC: rsnd: add DT support to DVC

Now, DVC can use DT

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --cc Documentation/devicetree/bindings/sound/renesas,rsnd.txt
Simple merge

diff --cc sound/soc/sh/rcar/core.c
Simple merge

diff --cc sound/soc/sh/rcar/dvc.c
Simple merge