Patch merged into coreboot/master: a2a87d4 ARM: Make it possible to use a custom bootblock implementation.

the following patch was just integrated into master:
commit a2a87d4bca39bdb2e0ffda88e50cab0a98a09621
Author: Gabe Black 
Date:   Sun Sep 29 05:40:13 2013 -0700

ARM: Make it possible to use a custom bootblock implementation.

Tegra needs to use a custom bootblock implementation because it starts on a
    coprocessor which uses ARMv4. It doesn't have the same control registers,
    caches, etc., and the regular bootblock gets exceptions and dies.

Change-Id: Id197db2939bc840ad64244d6e2017fc5c89e0cbd
    Signed-off-by: Gabe Black 
    Reviewed-on: https://chromium-review.googlesource.com/171018
    Reviewed-by: Ronald Minnich 
    Commit-Queue: Gabe Black 
    Tested-by: Gabe Black 
    (cherry picked from commit a66393fdd6fe68757e394b8a611e610f1938771d)
    Signed-off-by: Isaac Christensen 
    Reviewed-on: http://review.coreboot.org/6710
    Tested-by: build bot (Jenkins)
    Reviewed-by: Ronald G. Minnich 
    Reviewed-by: Furquan Shaikh

See http://review.coreboot.org/6710 for details.

-gerrit