intel SMI handlers: Refactor GPI SMI/SCI routing

Move the GPI interrupt routing selection between SMI/SCI from
mainboards to southbridge. There is speculation if this is all
just legacy APM stuff that could be removed with a followup.

Change-Id: Iab14cf347584513793f417febc47f0559e17f5a5
Signed-off-by: Kyösti Mälkki <>
Signed-off-by: Nicolas Reinecke <>
Tested-by: build bot (Jenkins)
Reviewed-by: Alexander Couzens <>
23 files changed