regulator: arizona-ldo1: 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/arizona-ldo1.o
   text	   data	    bss	    dec	    hex	filename
   1890	    720	      0	   2610	    a32	drivers/regulator/arizona-ldo1.o

File size after: drivers/regulator/arizona-ldo1.o
   text	   data	    bss	    dec	    hex	filename
   2402	    192	      0	   2594	    a22	drivers/regulator/arizona-ldo1.o
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/arizona-ldo1.c

@@ -109,7 +109,7 @@ static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
 	return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT;
 }
 
-static struct regulator_ops arizona_ldo1_hc_ops = {
+static const struct regulator_ops arizona_ldo1_hc_ops = {
 	.list_voltage = arizona_ldo1_hc_list_voltage,
 	.map_voltage = arizona_ldo1_hc_map_voltage,
 	.get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
@@ -135,7 +135,7 @@ static const struct regulator_desc arizona_ldo1_hc = {
 	.owner = THIS_MODULE,
 };
 
-static struct regulator_ops arizona_ldo1_ops = {
+static const struct regulator_ops arizona_ldo1_ops = {
 	.list_voltage = regulator_list_voltage_linear,
 	.map_voltage = regulator_map_voltage_linear,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,