The testcase was failing on BE, fix to use 32bit load
before calling testbit.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
Log=N

Bug: 
Change-Id: I075666b47dd90b6341ba7b4031cd4be96e8c1bf9
Reviewed-on: https://chromium-review.googlesource.com/628659Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Jaideep Bajwa <bjaideep@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#47556}