power: supply: bq256xx: Handle OOM correctly

Since we now return a pointer to an allocated object we need
to account for memory allocation failure in a separate
error path.

Fixes: 25fd330370ac ("power: supply_core: Pass pointer to battery info")
Reported-by: Dan Carpenter <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>
Signed-off-by: Sebastian Reichel <[e-mail]>

drivers/power/supply/bq256xx_charger.c

···
 						BQ256XX_WDT_BIT_SHIFT);
 
 	ret = power_supply_get_battery_info(bq->charger, &bat_info);
+	if (ret == -ENOMEM)
+		return ret;
+
 	if (ret) {
 		dev_warn(bq->dev, "battery info missing, default values will be applied\n");