regulator: tps6524x: Constify regulator_ops

The regulator_ops is never changed, make it const.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/tps6524x-regulator.c

@@ -565,7 +565,7 @@ static int is_supply_enabled(struct regulator_dev *rdev)
 	return read_field(hw, &info->enable);
 }
 
-static struct regulator_ops regulator_ops = {
+static const struct regulator_ops regulator_ops = {
 	.is_enabled		= is_supply_enabled,
 	.enable			= enable_supply,
 	.disable		= disable_supply,