ASoC: cs53l30: Constify struct regmap_config

`cs53l30_regmap` is not modified and can be declared as const to move
its data to a read-only section.
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20240703-sound-const-regmap_config-v1-4-2e379b0446a7@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/cs53l30.c

@@ -900,7 +900,7 @@ static const struct snd_soc_component_driver cs53l30_driver = {
 	.endianness		= 1,
 };
 
-static struct regmap_config cs53l30_regmap = {
+static const struct regmap_config cs53l30_regmap = {
 	.reg_bits = 8,
 	.val_bits = 8,