Patch merged into coreboot/master: 4dc3e28 tegra124: Add a utility function to read the cause of the most recent reset.

the following patch was just integrated into master:
commit 4dc3e28c741cd0b5ce6effeaec58eeda45b12303
Author: Gabe Black 
Date:   Tue May 6 15:33:37 2014 -0700

tegra124: Add a utility function to read the cause of the most recent reset.

When a watchdog reset happens, the SOC will reset but other parts of the
    system might not. In order to detect those situations we can check the
    rst_status register in the PMC.

BUG=chrome-os-partner:28559
    TEST=With this and a change which uses the new function in the nyan boards,
    built for nyan, nyan_big and nyan_blaze. Booted normally, through EC reset,
    software reset ("reboot" command from the terminal), and through watch dog
    reset. Verified that the new code only triggered during the watchdog reset and
    that the system rebooted and was able to boot without going into recovery mode
    unnecessarily.
    BRANCH=nyan

Original-Change-Id: I7430768baa0304d4ec8524957a9cc37078ac5a71
    Original-Signed-off-by: Gabe Black 
    Original-Reviewed-on: https://chromium-review.googlesource.com/198581
    Original-Reviewed-by: Tom Warren 
    Original-Reviewed-by: Andrew Bresticker 
    Original-Commit-Queue: Gabe Black 
    Original-Tested-by: Gabe Black 
    (cherry picked from commit 5fdc0239fc2960167dd9c074f3804bf9e4ad686a)
    Signed-off-by: Marc Jones

Change-Id: I5845d3a4d819868f5472c758e83e83b00e141b72
    Reviewed-on: http://review.coreboot.org/7899
    Tested-by: build bot (Jenkins)
    Reviewed-by: Edward O'Callaghan

See http://review.coreboot.org/7899 for details.

-gerrit