[coreboot] Patch merged into coreboot/master: 00e480e snow: use bootblock build class for GPIO

the following patch was just integrated into master:
commit 00e480e22d00088d4d6f8bb6b0a6b5c1f840f6a2
Author: David Hendricks 
Date:   Tue Feb 5 14:43:52 2013 -0800

snow: use bootblock build class for GPIO

This gets rid of a bunch of copy + pasted GPIO code.

Change-Id: I548b2b5d63642a9da185eb7b34f80cbebf9b124f
    Signed-off-by: David Hendricks 
    Reviewed-on: http://review.coreboot.org/2288
    Tested-by: build bot (Jenkins)
    Reviewed-by: Ronald G. Minnich

Build-Tested: build bot (Jenkins) at Wed Feb  6 00:21:21 2013, giving +1
Reviewed-By: Ronald G. Minnich  at Wed Feb  6 00:41:15 2013, giving +2
See http://review.coreboot.org/2288 for details.

-gerrit