regulator: fan53555: constify regulator_ops structure

Declare regulator_ops structure as const as it is only stored in the ops
field of a regulator_desc structure. This field is of type const, so
regulator_ops structures having this property can be made const too.

File size before: drivers/regulator/fan53555.o
text data bss dec hex filename
3512 496 8 4016 fb0 drivers/regulator/fan53555.o

File size after: drivers/regulator/fan53555.o
text data bss dec hex filename
3768 240 8 4016 fb0 drivers/regulator/fan53555.o

Signed-off-by: Bhumika Goyal <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/fan53555.c

···
 				  CTL_SLEW_MASK, regval << CTL_SLEW_SHIFT);
 }
 
-static struct regulator_ops fan53555_regulator_ops = {
+static const struct regulator_ops fan53555_regulator_ops = {
 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 	.set_voltage_time_sel = regulator_set_voltage_time_sel,