ASoC: rsnd: don't use discriminatory terms for function names

rsnd is using discriminatory terms for function names.
This patch changes it to "secondary"

One note here is that it do nothing to DMA related naming
for now, because it needs framework level modification.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87h7ub3qra.wl-kuninori.morimoto.gx@renesas.com


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