in the clock drivers, seperate the soft-state and hard-state which was

in the clock drivers, seperate the soft-state and hard-state which was
all jumbled up in the same functions. the rtc (mc chip) and clock (i8243)
startup was also mixed up.  they the soft state and hardware state can
be started in the right order, and it is easy to restart just the
neccessary parts upon resume.  tested in numerous cases:
(apic, pic) * (GENERIC.MP, GENERIC) * (mp, non-mp) * (i386, amd64)
ok kettenis