Patch merged into coreboot/master: f61809a storm: handle dual purpose recovery button

the following patch was just integrated into master:
commit f61809ab38ddde631586da7c1345c8dc787174f4
Author: Vadim Bendebury 
Date:   Fri Feb 20 12:49:47 2015 -0800

storm: handle dual purpose recovery button

Storm devices' recovery button is overloaded. Pressing it when the
    system is running is supposed to reset the device. To trigger recovery
    mode the button must be held pressed for at least 5 seconds after
    reset.

Currently interpreting the recovery button state is the responsibility
    of the board (vboot gets a consolidated state, which is a combination
    of several conditions), so the simplest way to implement this feature
    is to make the board follow the recovery button state.

In case the button is not pressed when it is first sampled, its state
    is saved immediately and no recovery request is reported. In case the
    button is pressed when it is first sampled, the board code keeps
    polling it up to 5 seconds and acts accordingly.

BRANCH=storm
    BUG=chrome-os-partner:36059
    TEST=tried starting a whirlwind with recovery button pressed for
         various durations, it entered recovery mode when the button was
         pressed longer than 5 seconds.

Change-Id: Icb3250be7c2a76089c070acd68cb521d1399e245
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: 45e7265bc760944f93dd98903d39d2b30aa96365
    Original-Change-Id: Iab3609ebce3a74e3d0270775b83f3cf03a8837ca
    Original-Signed-off-by: Vadim Bendebury 
    Original-Reviewed-on: https://chromium-review.googlesource.com/251711
    Original-Reviewed-by: Stefan Reinauer 
    Reviewed-on: http://review.coreboot.org/9761
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/9761 for details.

-gerrit