Patch merged into serialice/master: Cleanup on filter return values

the following patch was just integrated into master:
commit 93e51ef3b1cf1c969c01de713dfe843358bf60e8
Author: Kyösti Mälkki 
Date:   Fri Jun 3 18:30:08 2016 +0300

Cleanup on filter return values

Rewrite to make it clear what value hooks return. In all
    simplicity, return true if the instruction is processed by
    the filter and return false otherwise.

On pre-hooks, returning true indicates further pre-hooks
    will not be processed.

Change-Id: I201de34727cf5f0a3dfc6d869317c9cbe2ae41c7
    Signed-off-by: Kyösti Mälkki 
    Reviewed-on: https://review.coreboot.org/15062
    Tested-by: build bot (Jenkins)
    Reviewed-by: Antonello Dettori

See https://review.coreboot.org/15062 for details.

-gerrit