The HW default is one tick per second, however instead of assuming this,
lets make sure the waketimer is actually one tick per second before
arming the alarm.
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NJustin Chen <justinpopo6@gmail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>