MIPS: Change more PlatformCodeStubs to encode properties in the minor key.

Port r23394 (6366610)

BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/511463002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23418 ce2b1a6d-e550-0410-aec6-3dcde31c8c00