regulator: s5m8767: Constify regulator_ops

Static struct regulator_ops is not modified so can be made const for
code safeness.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/s5m8767.c

@@ -357,7 +357,7 @@ static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
 	return 0;
 }
 
-static struct regulator_ops s5m8767_ops = {
+static const struct regulator_ops s5m8767_ops = {
 	.list_voltage		= regulator_list_voltage_linear,
 	.is_enabled		= regulator_is_enabled_regmap,
 	.enable			= regulator_enable_regmap,
@@ -367,7 +367,7 @@ static struct regulator_ops s5m8767_ops = {
 	.set_voltage_time_sel	= s5m8767_set_voltage_time_sel,
 };
 
-static struct regulator_ops s5m8767_buck78_ops = {
+static const struct regulator_ops s5m8767_buck78_ops = {
 	.list_voltage		= regulator_list_voltage_linear,
 	.is_enabled		= regulator_is_enabled_regmap,
 	.enable			= regulator_enable_regmap,