power: supply: bq25980: Fix uninitialized wd_reg_val

Fix the uninitialized wd_reg_val if the for..loop was not successful in
finding an appropriate match.

Fixes: 5069185f ("power: supply: bq25980: Add support for the BQ259xx family")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

drivers/power/supply/bq25980_charger.c

@@ -1096,7 +1096,7 @@ static int bq25980_power_supply_init(struct bq25980_device *bq,
 static int bq25980_hw_init(struct bq25980_device *bq)
 {
 	struct power_supply_battery_info bat_info = { };
-	int wd_reg_val;
+	int wd_reg_val = 0;
 	int ret = 0;
 	int curr_val;
 	int volt_val;