ELOG: Log run-time SMI southbridge events

Events are logged for SMIs that trigger ACPI sleeps state
entry and when the power button press triggers an SMI such
as at the developer/recovery screens.

Generate ACPI sleep state events and power button
events and verify they show up in the log:

153 | 2012-06-23 17:12:59 | ACPI Enter | S5
184 | 2012-06-23 17:15:50 | ACPI Enter | S3
216 | 2012-06-23 17:28:58 | Power Button

Change-Id: Iba134d619780e459bce189d36d57844997ffb009
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/1320
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
1 file changed