regulator: ltc3676: Constify ltc3676_regulators

ltc3676_regulators is not modified and can be made const to allow the
compiler to put it in read-only memory.

Before:
   text    data     bss     dec     hex filename
   4361    2064       8    6433    1921 drivers/regulator/ltc3676.o

After:
   text    data     bss     dec     hex filename
   6121     304       8    6433    1921 drivers/regulator/ltc3676.o
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20200617223247.25566-4-rikard.falkeborn@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/ltc3676.c

@@ -221,7 +221,7 @@ static const struct regulator_ops ltc3676_fixed_regulator_ops = {
 #define LTC3676_FIXED_REG(_id, _name, _en_reg, _en_bit)                \
 	LTC3676_REG(_id, _name, fixed, LTC3676_ ## _en_reg, _en_bit, 0, 0)
 
-static struct regulator_desc ltc3676_regulators[LTC3676_NUM_REGULATORS] = {
+static const struct regulator_desc ltc3676_regulators[LTC3676_NUM_REGULATORS] = {
 	LTC3676_LINEAR_REG(SW1, sw1, BUCK1, DVB1A),
 	LTC3676_LINEAR_REG(SW2, sw2, BUCK2, DVB2A),
 	LTC3676_LINEAR_REG(SW3, sw3, BUCK3, DVB3A),