ASoC: rsnd: cleanup debug information method

rsnd_mod debug information is implemented
in each callback functions now.
But, it can be implemented in rsnd_mod_call(),
and share this code.
This patch adds it

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