regulator: tps65090: constify static regulator_ops

The only usages of these are to assign their address to the ops field in
the regulator_desc struct, which is a const pointer. Make them const to
allow the compiler to put them in read-only memory.
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20200829221104.20870-6-rikard.falkeborn@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/tps65090-regulator.c

@@ -47,7 +47,7 @@ struct tps65090_regulator {
 	int			overcurrent_wait;
 };
 
-static struct regulator_ops tps65090_ext_control_ops = {
+static const struct regulator_ops tps65090_ext_control_ops = {
 };
 
 /**
@@ -167,19 +167,19 @@ static int tps65090_fet_enable(struct regulator_dev *rdev)
 	return ret;
 }
 
-static struct regulator_ops tps65090_reg_control_ops = {
+static const struct regulator_ops tps65090_reg_control_ops = {
 	.enable		= regulator_enable_regmap,
 	.disable	= regulator_disable_regmap,
 	.is_enabled	= regulator_is_enabled_regmap,
 };
 
-static struct regulator_ops tps65090_fet_control_ops = {
+static const struct regulator_ops tps65090_fet_control_ops = {
 	.enable		= tps65090_fet_enable,
 	.disable	= regulator_disable_regmap,
 	.is_enabled	= regulator_is_enabled_regmap,
 };
 
-static struct regulator_ops tps65090_ldo_ops = {
+static const struct regulator_ops tps65090_ldo_ops = {
 };
 
 #define tps65090_REG_DESC(_id, _sname, _en_reg, _en_bits, _nvolt, _volt, _ops) \