ASoC: ssi: don't use discriminatory terms for debug log

ssi is using discriminatory terms for debug log.
This patch changes it to "secondary"

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87blkj3qq9.wl-kuninori.morimoto.gx@renesas.com


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