power_supply: rt5033: Constify struct regmap_config

The regmap_config struct may be const because it is not modified by the
driver and regmap_init() accepts pointer to const.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

drivers/power/rt5033_battery.c

@@ -102,7 +102,7 @@ static enum power_supply_property rt5033_battery_props[] = {
 	POWER_SUPPLY_PROP_CAPACITY,
 };
 
-static struct regmap_config rt5033_battery_regmap_config = {
+static const struct regmap_config rt5033_battery_regmap_config = {
 	.reg_bits	= 8,
 	.val_bits	= 8,
 	.max_register	= RT5033_FUEL_REG_END,