Revert of MIPS: Add float instructions and test coverage, part one

Revert of MIPS: Add float instructions and test coverage, part one

Reason for revert:
Simulator test failures in RunChangeFloat64ToInt.., RunChangeTaggedToInt32,
div-mul-minus-one

Original issue's description:

> Implement assembler, disassembler tests for all instructions for mips32
> and mips64. Additionally, add missing single precision float instructions
> for r2 and r6 architecture variants in assembler, simulator and disassembler
> with corresponding tests.

BUG=

Committed: https://crrev.com/d090469cdd736240f7172696e1f30096695536fc
Cr-Commit-Position: refs/heads/master@{#28404}

[paul.l..., 2015-05-14 18:15:54]

paul.lind@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, balazs.kilvady@imgtec.com, danno@chromium.org,
djordje.pesut@imgtec.com, dusan.milosavljevic@imgtec.com

[dusmil.imgtec, 2015-05-14 18:18:20]

Lgtm.

[paul.l..., 2015-05-14 18:19:07]

The CQ bit was checked by paul.lind@imgtec.com

[commit-bot: I haz the power, 2015-05-14 18:19:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1143473003/1

[paul.l..., 2015-05-14 18:28:03]

paul.lind@imgtec.com changed reviewers:
+ djordje.pesic@imgtec.com
- djordje.pesut@imgtec.com

[paul.l..., 2015-05-14 18:28:04]

Add author Djordje Pesic to the issue. (I got the wrong name on issue
submission)

[commit-bot: I haz the power, 2015-05-14 18:44:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-14 18:45:06]

Patchset 1 (id:??) landed as
https://crrev.com/d090469cdd736240f7172696e1f30096695536fc
Cr-Commit-Position: refs/heads/master@{#28404}