MIPS: Fix bugs in DeoptimizeIf when lazy deopt is requested.

Port r13633 (9e314349)

BUG=
TEST=

Review URL: https://codereview.chromium.org/12220105
Patch from Akos Palfi <palfia@homejinni.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@13643 ce2b1a6d-e550-0410-aec6-3dcde31c8c00