power: supply: z2_battery: Fix possible memleak in z2_batt_probe()

power: supply: z2_battery: Fix possible memleak in z2_batt_probe()

[ Upstream commit 8a89b3d5bcbad5da817f3319372852ec564b44cc ]

If devm_gpiod_get_optional() returns error, the charger should be
freed before z2_batt_probe returns according to the context. We
fix it by just gotoing to 'err' branch.

Fixes: 2f6af7e9a665 ("power: supply: z2_battery: Convert to GPIO descriptors")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>