ASoC: rsnd: do error check after rsnd_channel_normalization()

SSI need to use rsnd_channel_normalization() for TDM-split mode,
thus, channel check need to do after that.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/874l1aw39d.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>