MIPS64: Improve deopt jump table code size.

MIPS64: Improve deopt jump table code size.

The number of generated instructions per table entry is reduced from six to
two, or four in worst-case scenario.

TEST=
BUG=

Committed: https://crrev.com/c7685d2f99883b6360597c1a8f0268882d01e602
Cr-Commit-Position: refs/heads/master@{#27599}

[dusmil.imgtec, 2015-04-03 10:41:44]

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

[paul.l..., 2015-04-03 16:44:21]

LGTM!

[dusmil.imgtec, 2015-04-03 17:10:05]

The CQ bit was checked by dusan.milosavljevic@imgtec.com

[commit-bot: I haz the power, 2015-04-03 17:10:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1059213002/1

[commit-bot: I haz the power, 2015-04-03 18:02:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-03 18:02:38]

Patchset 1 (id:??) landed as
https://crrev.com/c7685d2f99883b6360597c1a8f0268882d01e602
Cr-Commit-Position: refs/heads/master@{#27599}