extcon: adc-jack: Fix wakeup source leaks on device unbind

Device can be unbound, so driver must also release memory for the wakeup
source.  Do not use devm interface, because it would change the order of
cleanup.

Link: https://lore.kernel.org/lkml/20250501-device-wakeup-leak-extcon-v2-1-7af77802cbea@linaro.org/


Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>