rtc: mv: let the core handle invalid alarms

Instead of lying to the core when the alarm is invalid, let it handle that
by returning the error.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Tested-by: Gregory CLEMENT <gregory.clement@bootlin.com>  (on Armada 375 DB)
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
1 file changed