regulator: s2mpa01: 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/s2mpa01.c

@@ -212,7 +212,7 @@ ramp_disable:
 				  1 << enable_shift, 0);
 }
 
-static struct regulator_ops s2mpa01_ldo_ops = {
+static const struct regulator_ops s2mpa01_ldo_ops = {
 	.list_voltage		= regulator_list_voltage_linear,
 	.map_voltage		= regulator_map_voltage_linear,
 	.is_enabled		= regulator_is_enabled_regmap,
@@ -223,7 +223,7 @@ static struct regulator_ops s2mpa01_ldo_ops = {
 	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
 };
 
-static struct regulator_ops s2mpa01_buck_ops = {
+static const struct regulator_ops s2mpa01_buck_ops = {
 	.list_voltage		= regulator_list_voltage_linear,
 	.map_voltage		= regulator_map_voltage_linear,
 	.is_enabled		= regulator_is_enabled_regmap,