MIPS64: Fix the integer division in crankshaft.

MIPS64: Fix the integer division in crankshaft.

Replaces the 64-bit div instruction with 32-bit division in DivI.
Also fixes the Ddiv implementation in the simulator.

TEST=mjsunit/asm/int32div
BUG=

Committed: https://crrev.com/437c789a26960e6902fe7f905c6b7dc5784c8c9b
Cr-Commit-Position: refs/heads/master@{#29920}

[akos.palfi.imgtec, 2015-07-29 11:15:14]

akos.palfi@imgtec.com changed reviewers:
+ balazs.kilvady@imgtec.com, gergely.kis@imgtec.com, paul.lind@imgtec.com

[akos.palfi.imgtec, 2015-07-29 11:15:14]

PTAL.

[dusmil.imgtec, 2015-07-29 19:05:31]

lgtm.

[paul.l..., 2015-07-29 19:21:17]

LGTM, thanks.

[akos.palfi.imgtec, 2015-07-29 20:03:10]

The CQ bit was checked by akos.palfi@imgtec.com

[commit-bot: I haz the power, 2015-07-29 20:03:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1265603002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1265603002/1

[commit-bot: I haz the power, 2015-07-30 09:16:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-30 09:16:39]

Patchset 1 (id:??) landed as
https://crrev.com/437c789a26960e6902fe7f905c6b7dc5784c8c9b
Cr-Commit-Position: refs/heads/master@{#29920}