southbridge/hudson: Compile refactored SMI setup utilities in SMM
Refactor hudson_enable_gevent_smi() to allow configuring the interrupt
mode and trigger level. Move the utilities which are useful in SMM to
a separate file that is included in both ramstage and SMM. This is
useful for SMI handlers which need to enable or disable GEVENT SMIs
on-the-fly. A follow-up patch makes use of this infrastructure.
Change-Id: Ifa4c300c00c178b18d7280690cfc4b8367c669b8
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/170
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@gmail.com>