ASoC: apple: mca: Fix final status read on SERDES reset

ASoC: apple: mca: Fix final status read on SERDES reset

[ Upstream commit ffeceb298c8cb7aefe1106d4c3144b5c42745d73 ]

From within the early trigger we are doing a reset of the SERDES unit,
but the final status read is on a bad address. Add the missing SERDES
unit offset in calculation of the address.

Fixes: ce504fe0a101 ("ASoC: apple: mca: Start new platform driver")
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20230224153302.45365-1-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>