regulator: tps65023: Constify static data

Driver does not modify static data with regulator description (struct
tps_driver_data), 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/tps65023-regulator.c

···
 	TPS65023_REGULATOR_LDO(2, TPS65023_LDO2_VSEL_table, 0x70),
 };
 
-static struct tps_driver_data tps65020_drv_data = {
+static const struct tps_driver_data tps65020_drv_data = {
 	.desc = tps65020_regulators,
 	.core_regulator = TPS65023_DCDC_3,
 };
 
-static struct tps_driver_data tps65021_drv_data = {
+static const struct tps_driver_data tps65021_drv_data = {
 	.desc = tps65021_regulators,
 	.core_regulator = TPS65023_DCDC_3,
 };
 
-static struct tps_driver_data tps65023_drv_data = {
+static const struct tps_driver_data tps65023_drv_data = {
 	.desc = tps65023_regulators,
 	.core_regulator = TPS65023_DCDC_1,
 };