regulator: hi6421v600: Constify static data

Driver does not modify static data with regulator description (struct
hi6421_spmi_reg_info), so make it const for code safety.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/hi6421v600-regulator.c

···
 
 static unsigned int hi6421_spmi_regulator_get_mode(struct regulator_dev *rdev)
 {
-	struct hi6421_spmi_reg_info *sreg;
+	const struct hi6421_spmi_reg_info *sreg;
 	unsigned int reg_val;
 
 	sreg = container_of(rdev->desc, struct hi6421_spmi_reg_info, desc);
···
 static int hi6421_spmi_regulator_set_mode(struct regulator_dev *rdev,
 					  unsigned int mode)
 {
-	struct hi6421_spmi_reg_info *sreg;
+	const struct hi6421_spmi_reg_info *sreg;
 	unsigned int val;
 
 	sreg = container_of(rdev->desc, struct hi6421_spmi_reg_info, desc);
···
 				       int input_uV, int output_uV,
 				       int load_uA)
 {
-	struct hi6421_spmi_reg_info *sreg;
+	const struct hi6421_spmi_reg_info *sreg;
 
 	sreg = container_of(rdev->desc, struct hi6421_spmi_reg_info, desc);
 
···
 	hi6421v600_ldo34,
 };
 
-static struct hi6421_spmi_reg_info regulator_info[] = {
+static const struct hi6421_spmi_reg_info regulator_info[] = {
 	HI6421V600_LDO(ldo3, range_1v5_to_2v0,
 		       0x16, 0x01, 0x51,
 		       20000, 120,
···
 	struct device *pmic_dev = pdev->dev.parent;
 	struct regulator_config config = { };
 	struct hi6421_spmi_reg_priv *priv;
-	struct hi6421_spmi_reg_info *info;
+	const struct hi6421_spmi_reg_info *info;
 	struct device *dev = &pdev->dev;
 	struct regmap *regmap;
 	struct regulator_dev *rdev;