power: supply: Reset err after not finding static battery

Otherwise power_supply_get_battery_info always returns -ENODEV
on devices that do not have a static battery, even when a simple
battery is found.

Fixes: c8aee3f4 ("power: supply: Static data for Samsung batteries")
Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>