ASoC: rsnd: fixup mod ID calculation in rsnd_ctu_probe_

commit c16015f3 ("ASoC: rsnd: add .get_id/.get_id_sub")
introduces rsnd_ctu_id which calcualates and gives
the main Device id of the CTU by dividing the id by 4.
rsnd_mod_id uses this interface to get the CTU main
Device id. But this commit forgets to revert the main
Device id calcution previously done in rsnd_ctu_probe_
which also divides the id by 4. This path corrects the
same to get the correct main Device id.

The issue is observered when rsnd_ctu_probe_ is done for CTU1

Fixes: c16015f3 ("ASoC: rsnd: add .get_id/.get_id_sub")

Signed-off-by: Nilkanth Ahirrao <anilkanth@jp.adit-jv.com>
Signed-off-by: Suresh Udipi <sudipi@jp.adit-jv.com>
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>