ASoC: rsnd: rename rsnd_dai_get() to rsnd_rdai_get()

struct rsnd_dai is called as "rdai", and struct snd_soc_dai is called
as "dai" on this driver. but macro/function have confusable naming.
This patch rename rsnd_dai_get() to rsnd_rdai_get()

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

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

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