Patch merged into coreboot/master: e19c8b0 acpi: protect acpi generators from PRE_RAM & SMM

the following patch was just integrated into master:
commit e19c8b0091022ae3f490601aed0c290cd5171b79
Author: Alexander Couzens 
Date:   Thu Apr 2 23:20:45 2015 +0200

acpi: protect acpi generators from PRE_RAM & SMM

acpi generators run only in RAM stage.

Change-Id: Ia2ab677848fef38976c85dda1c2773ae065856b0
    Signed-off-by: Alexander Couzens 
    Reviewed-on: http://review.coreboot.org/9249
    Reviewed-by: Aaron Durbin 
    Tested-by: build bot (Jenkins)

See http://review.coreboot.org/9249 for details.

-gerrit