rtc: ingenic: Set wakeup params in probe

We can write the wakeup timing parameters as soon as the driver probes,
there's no need to wait the very last moment.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20200505221336.222313-4-paul@crapouillou.net


Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>