mips32: Fix typo.

Fix some typo error and some errors in tests that was discovered while running Valgrind on MIPS/Android.
In some cases initial FCSR value wasn't being set properly.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13746 a5019735-40e9-0310-863c-91ae7b9d1cf9