regulator: isl6271a: Constify isl_core_ops and isl_fixed_ops

Signed-off-by: Axel Lin <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/isl6271a-regulator.c

···
 	return err;
 }
 
-static struct regulator_ops isl_core_ops = {
+static const struct regulator_ops isl_core_ops = {
 	.get_voltage_sel = isl6271a_get_voltage_sel,
 	.set_voltage_sel = isl6271a_set_voltage_sel,
 	.list_voltage	= regulator_list_voltage_linear,
 	.map_voltage	= regulator_map_voltage_linear,
 };
 
-static struct regulator_ops isl_fixed_ops = {
+static const struct regulator_ops isl_fixed_ops = {
 	.list_voltage	= regulator_list_voltage_linear,
 };