[coreboot] Patch merged into coreboot/master: ad7f98c exynos/s5p: Add helper function for reading a single MVL3 GPIO

the following patch was just integrated into master:
commit ad7f98cb0163d0ef2b0e6f75d334cdbd6faf846c
Author: David Hendricks 
Date:   Sat Feb 2 17:02:36 2013 -0800

exynos/s5p: Add helper function for reading a single MVL3 GPIO

This adds a helper function to read only a single GPIO which uses
    3-state logic. Examples of this typically include board straps which
    are used to provide mainboard-specific information at the hardware-
    level, such as board revision or configuration options.

This is part of a larger clean-up effort for Snow. We may want to
    genericise this for other CPUs in the future.

Change-Id: Ic44f5e589cda89b419a07eca246847e9ce7dcd8d
    Signed-off-by: David Hendricks 
    Reviewed-on: http://review.coreboot.org/2266
    Tested-by: build bot (Jenkins)
    Reviewed-by: Ronald G. Minnich

Build-Tested: build bot (Jenkins) at Mon Feb  4 05:46:55 2013, giving +1
Reviewed-By: Ronald G. Minnich  at Mon Feb  4 05:52:18 2013, giving +2
See http://review.coreboot.org/2266 for details.

-gerrit