The RTC alarm and update fakes where not defined correctly. This
commit adjusts them to match the RTC API.
Signed-off-by: Bjarki Arge Andreasen <bjarki.andreasen@nordicsemi.no>
This change marks each instance of the 'rtc_driver_api' as 'static const'.
The rationale is that 'rtc_driver_api' is used for declaring internal
module interfaces and is not intended to be modified at runtime.
By using 'static const', we ensure immutability, leading to usage of only
.rodata and a reduction in the .data area.
Signed-off-by: Pisit Sawangvonganan <pisit@ndrsolution.com>