regulator: slg51000: Constify slg51000_regl_ops and slg51000_switch_ops

These regulator_ops variables never need to be modified, make them const so
compiler can put them to .rodata.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/slg51000-regulator.c

@@ -183,7 +183,7 @@ static const struct regmap_config slg51000_regmap_config = {
 	.volatile_table = &slg51000_volatile_table,
 };
 
-static struct regulator_ops slg51000_regl_ops = {
+static const struct regulator_ops slg51000_regl_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
@@ -193,7 +193,7 @@ static struct regulator_ops slg51000_regl_ops = {
 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 };
 
-static struct regulator_ops slg51000_switch_ops = {
+static const struct regulator_ops slg51000_switch_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,