ASoC: rt*: Constify static struct acpi_device_id

These are never modified, so make them const to allow the compiler to
put them in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20210224211918.39109-4-rikard.falkeborn@gmail.com


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