Patch merged into coreboot/master: 03784fa Add check_member macro to allow clean and easy struct offset checking

the following patch was just integrated into master:
commit 03784fa97a764be81ca9bcf79222e7b37e2e7692
Author: Julius Werner 
Date:   Mon Dec 9 17:46:22 2013 -0800

Add check_member macro to allow clean and easy struct offset checking

This patch adds a new static assertion macro that can be used to check
    the offsets in structures that overlay register sets at compile time. It
    uses the _Static_assert() declaration from the new ISO C11 standard,
    which is supported (even without -std=c11) by GCC after version 4.6.
    (There is supposedly also support in clang, although I haven't tried
    it... let's deal with compiler issues when/if they turn up.)

I've added it to all structures for our current ARM SoCs for now, and I
    think every new register overlay we add going forward should use them
    (at least for the last member, but feel free to add more if you think
    it's useful).

Change-Id: If32510e7049739ad05618d363a854dc372d64386
    Signed-off-by: Julius Werner 
    Reviewed-on: https://chromium-review.googlesource.com/179412
    Reviewed-by: David Hendricks 
    Reviewed-by: Stefan Reinauer 
    (cherry picked from commit cef5fa13c31375a316ca4556c0039b17c8ea7900)
    Signed-off-by: Isaac Christensen 
    Reviewed-on: http://review.coreboot.org/6905
    Tested-by: build bot (Jenkins)

See http://review.coreboot.org/6905 for details.

-gerrit