ASoC: codecs: Constify regmap configuration static variables

Static arrays/structs for regmap configuration like 'struct
reg_default', 'struct reg_sequence' and others are not modified so can
be changed to const for more safety.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Link: https://patch.msgid.link/20250528-asoc-const-unused-v1-1-19a5d07b9d5c@linaro.org


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