[turbofan] Fix recognition of Uint32Div in simplified lowering.

TEST=mjsunit/asm
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/701813003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25103 ce2b1a6d-e550-0410-aec6-3dcde31c8c00