ASoC: cs42l83: change cs42l83_regmap to static

cs42l83_regmap is only used in cs42l83-i2c.c now, change it to static.

Fixes: 94d5f62a ("ASoC: cs42l83: Extend CS42L42 support to new part")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220921153123.1508144-1-yangyingliang@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/cs42l83-i2c.c

@@ -145,7 +145,7 @@ static const struct reg_default cs42l83_reg_defaults[] = {
  * This is all the same as for CS42L42 but we
  * replace the on-reset register defaults.
  */
-const struct regmap_config cs42l83_regmap = {
+static const struct regmap_config cs42l83_regmap = {
 	.reg_bits = 8,
 	.val_bits = 8,