hwmon: (pmbus_core) Constify pmbus_regulator_ops

pmbus_regulator_ops is not modified after initialized, so make it const.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/pmbus/pmbus.h

@@ -380,7 +380,7 @@ struct pmbus_driver_info {
 
 /* Regulator ops */
 
-extern struct regulator_ops pmbus_regulator_ops;
+extern const struct regulator_ops pmbus_regulator_ops;
 
 /* Macro for filling in array of struct regulator_desc */
 #define PMBUS_REGULATOR(_name, _id)				\

drivers/hwmon/pmbus/pmbus_core.c

@@ -1796,7 +1796,7 @@ static int pmbus_regulator_disable(struct regulator_dev *rdev)
 	return _pmbus_regulator_on_off(rdev, 0);
 }
 
-struct regulator_ops pmbus_regulator_ops = {
+const struct regulator_ops pmbus_regulator_ops = {
 	.enable = pmbus_regulator_enable,
 	.disable = pmbus_regulator_disable,
 	.is_enabled = pmbus_regulator_is_enabled,