- separate init and resume code paths (so that the [larger] init parts
  can go init .init.* sections)
- drop the separate legacy_hpet_event object, as we can easily re-use
  the first slot of hpet_events[] for that purpose (the whole array is
  otherwise unused when the legacy code is being used)
- use section placement attributes where reasonable

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Wei Gang <gang.wei@intel.com>