Fix CWDE & CWD to use 66_prefix, instead of osz_refining_prefix
Fix CWDE & CWD to use 66_prefix, instead of osz_refining_prefix

   * osz_refining_prefix requires that there be no F2/F3 prefixes.

   * It is my understanding that scalable opcodes like this one do not
   moot 66 in the presence of f2/f3 like most of the non-scalable
   (SSE?) opcodes do.

Change-Id: Ibc5a90db692b8e9bcf318f37a2ff996ed060163f
(cherry picked from commit 2cd8ea3b26c897d172fb2b33c92e531db7dbe3d0)

intelxed/xed,intelxed/xed,intelxed/xed,intelxed/xed