ASoC: Intel: soc-acpi: use const for all uses of snd_soc_acpi_codecs

'const' qualifiers are missing on some platforms, add as needed.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Brent Lu <brent.lu@intel.com>
Link: https://lore.kernel.org/r/20211029171409.611600-7-brent.lu@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>