Patch merged into coreboot/master: ff6d4fa arm64: Add conditional read/write from/to EL3 assembly macros.

the following patch was just integrated into master:
commit ff6d4facbb956175ef6ef9742545924b7fff4fad
Author: Furquan Shaikh 
Date:   Fri Nov 21 15:35:17 2014 -0800

arm64: Add conditional read/write from/to EL3 assembly macros.

Some registers are available only at EL3. Add conditional read/write functions
    that perform operations only if currently we are in EL3.

BUG=chrome-os-partner:33962
    BRANCH=None
    TEST=Compiles and boots to kernel prompt.

Change-Id: Ic95838d10e18f58867b6b77aee937bdacae50597
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: 62a0e324a00248dba92cb3e2ac2f4072d0e4e2a7
    Original-Signed-off-by: Furquan Shaikh 
    Original-Change-Id: Ia170d94adb9ecc141ff86e4a3041ddbf9045bc89
    Original-Reviewed-on: https://chromium-review.googlesource.com/231549
    Original-Reviewed-by: Aaron Durbin 
    Original-Tested-by: Furquan Shaikh 
    Original-Commit-Queue: Furquan Shaikh 
    Reviewed-on: http://review.coreboot.org/9538
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/9538 for details.

-gerrit