ASoC: sh: switch to use rtd->id from rtd->num

Now rtd->num is renamed to rtd->id. Let's switch.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/87v7xib85e.wl-kuninori.morimoto.gx@renesas.com


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