regulator: pca9450: Constify pointers to 'regulator_desc' wrap struct

Pointer to 'struct regulator_desc' is a pointer to const and the
wrapping structure (container) is not being modified, thus entire syntax
can be replaced to preferred and safer container_of_const().

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

drivers/regulator/pca9450-regulator.c

···
 	}
 
 	if (ret == 0) {
-		struct pca9450_regulator_desc *regulator = container_of(desc,
+		const struct pca9450_regulator_desc *regulator = container_of_const(desc,
 					struct pca9450_regulator_desc, desc);
 
 		/* Enable DVS control through PMIC_STBY_REQ for this BUCK */
···
 			    const struct regulator_desc *desc,
 			    struct regulator_config *cfg)
 {
-	struct pca9450_regulator_desc *data = container_of(desc,
+	const struct pca9450_regulator_desc *data = container_of_const(desc,
 					struct pca9450_regulator_desc, desc);
 	const struct pc9450_dvs_config *dvs = &data->dvs;
 	unsigned int reg, mask;
···
 
 static int pca9450_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
 {
-	struct pca9450_regulator_desc *desc = container_of(rdev->desc,
+	const struct pca9450_regulator_desc *desc = container_of_const(rdev->desc,
 					struct pca9450_regulator_desc, desc);
 	const struct pc9450_dvs_config *dvs = &desc->dvs;
 	int val;
···
 
 static unsigned int pca9450_buck_get_mode(struct regulator_dev *rdev)
 {
-	struct pca9450_regulator_desc *desc = container_of(rdev->desc,
+	const struct pca9450_regulator_desc *desc = container_of_const(rdev->desc,
 					struct pca9450_regulator_desc, desc);
 	const struct pc9450_dvs_config *dvs = &desc->dvs;
 	int ret = 0, regval;