regulator: qcom-refgen: Constify static data

Driver does not modify static data with regulator description (struct
regulator_desc), so make it const for code safety.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20240909-regulator-const-v1-14-8934704a5787@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/qcom-refgen-regulator.c

@@ -62,7 +62,7 @@ static int qcom_sdm845_refgen_is_enabled(struct regulator_dev *rdev)
 	return 1;
 }
 
-static struct regulator_desc sdm845_refgen_desc = {
+static const struct regulator_desc sdm845_refgen_desc = {
 	.enable_time = 5,
 	.name = "refgen",
 	.owner = THIS_MODULE,
@@ -74,7 +74,7 @@ static struct regulator_desc sdm845_refgen_desc = {
 	},
 };
 
-static struct regulator_desc sm8250_refgen_desc = {
+static const struct regulator_desc sm8250_refgen_desc = {
 	.enable_reg = REFGEN_REG_PWRDWN_CTRL5,
 	.enable_mask = REFGEN_PWRDWN_CTRL5_MASK,
 	.enable_val = REFGEN_PWRDWN_CTRL5_ENABLE,