Patch merged into coreboot/master: Revert "arm64: remove assembly code string functions"

the following patch was just integrated into master:
commit 464f5ca6d61c907be83adea15e68cf93b769fb3d
Author: Furquan Shaikh 
Date:   Mon Jun 8 10:31:55 2015 -0700

Revert "arm64: remove assembly code string functions"

This reverts commit 00263d0d8ee23bbe60ea359ea9cb33d551688980
    to reintroduce optimized string handling functions.

BUG=chrome-os-partner:41185
    BRANCH=None
    TEST=Compiles successfully and boots to kernel prompt on Smaug

Change-Id: I47f8d8afa5c9ff3fca67d4d0f393336fef03402b
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: eeb38afea828a2727d815e4fb5762cfdd09a2b3a
    Original-Change-Id: Id053cbcea8b5e7ae29bdd6bb8b6f5e5011c42b00
    Original-Signed-off-by: Furquan Shaikh 
    Original-Reviewed-on: https://chromium-review.googlesource.com/275865
    Original-Trybot-Ready: Furquan Shaikh 
    Original-Tested-by: Furquan Shaikh 
    Original-Reviewed-by: Aaron Durbin 
    Original-Commit-Queue: Furquan Shaikh 
    Reviewed-on: http://review.coreboot.org/10564
    Tested-by: build bot (Jenkins)
    Reviewed-by: Marc Jones

See http://review.coreboot.org/10564 for details.

-gerrit