ref: 7ee58985bd080bff50149dfd2f2ab373a55650a0
parent: b66f7016c1eed780545efa2518a7f33ae401ee35
author: Jingning Han <jingning@google.com>
date: Tue Oct 7 08:45:25 EDT 2014
Replace mi_width_log2() with mi_width_log2_lookup table Change-Id: If0ea98aa139d14d40cd924114e18396aff36b5a5