Extra parameters passed to a builtin function in AIX were undefined.
Issue had to do with using LoadP instead of lwz to load this FieldMemOperand.

Change-Id: Ia21b691c64bee2fec1b3f4ec24ca6518c5ae61d9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1687767
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#62511}