ASoC: rsnd: moves clkout_name to top of the file

This patch moves clkout_name to top of the file to handling both
clkin/clkout in the same place.

This is prepare for R-Car Gen4 support.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87wn525emc.wl-kuninori.morimoto.gx@renesas.com


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