ASoC: rsnd: add DVC support

This patch adds DVC (Digital Volume Controller)
support which is member of CMD unit.

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

diff --cc include/sound/rcar_snd.h
Simple merge

diff --cc sound/soc/sh/rcar/Makefile
Simple merge

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

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

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

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

diff --cc sound/soc/sh/rcar/rsnd.h
Simple merge

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