ASoC: rsnd: add rsnd_ssi_busif_err_status_clear()

Current ssi.c clears BUSIF error status at __rsnd_ssi_interrupt(),
but its code is verbose.
This patch off-load it to rsnd_ssi_busif_err_status_clear().

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/8735w11jso.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>