rtc: s5m: switch to devm_device_init_wakeup

rtc: s5m: switch to devm_device_init_wakeup

To release memory allocated by device_init_wakeup(true), drivers have
to call device_init_wakeup(false) in error paths and unbind.

Switch to the new devres managed version devm_device_init_wakeup() to
plug this memleak.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: André Draszik <andre.draszik@linaro.org>
Link: https://lore.kernel.org/r/20250409-s2mpg10-v4-29-d66d5f39b6bf@linaro.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>