MIPS: Remove wrong restriction in GenerateDeoptJumpTable.

* This Abort condition does not apply to MIPS, since the
  assembler can also emit long Branches automatically, when
  it is needed.

TEST=mjsunit/math-floor-of-div,benchmarks/octane/gbemu,benchmarks/octane/mandreel

BUG=

Review URL: https://codereview.chromium.org/23020018

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16223 ce2b1a6d-e550-0410-aec6-3dcde31c8c00