Patch merged into coreboot/master: 8de0ca4 rambi: Fix eDP panel functionality

the following patch was just integrated into master:
commit 8de0ca435e7cee39cd5b7523aea4c7c59d1113d8
Author: Duncan Laurie 
Date:   Wed Nov 6 10:58:46 2013 -0800

rambi: Fix eDP panel functionality

For some mysterious reason GPIO_S0_NC22 is making the eDP panel
    go entirely white when it is configured with internal pullup.
    Since these (supposedly XDP related) pins are unknown functionality
    lets set them to GPIO_DEFAULT instead of GPIO_NC.

Additionally the VBIOS is being changed to issue int15 callback
    to determine the boot graphics device.  If we list both LFP and EFP
    then the dev/rec screens will show on the panel when HDMI is not
    attached and otherwise will display on HDMI.

BUG=chrome-os-partner:23507
    BRANCH=rambi
    TEST=build and boot on rambi, see firmware/kernel screens on the panel
    when HDMI is not attached, and firmware screens on the panel and
    kernel screens on both when HDMI is attached.

Change-Id: Ieb05a591d63c4f8e09fa154eeb76004d32579508
    Signed-off-by: Duncan Laurie 
    Reviewed-on: https://chromium-review.googlesource.com/175952
    Reviewed-by: Shawn Nematbakhsh 
    Reviewed-by: Aaron Durbin 
    Signed-off-by: Aaron Durbin 
    Reviewed-on: http://review.coreboot.org/4944
    Tested-by: build bot (Jenkins)
    Reviewed-by: Kyösti Mälkki

See http://review.coreboot.org/4944 for details.

-gerrit