MIPS: Fix stack claim and store to slot for large sizes.

MIPS: Fix stack claim and store to slot for large sizes.

Could not encode the large slot number in opcode MiscField.

TEST=mozilla/js/tests/js1_5/Regress/regress-396684.js
BUG=

Committed: https://crrev.com/94506cc3c295dc8a47d55afa9f249b273bd5d7f1
Cr-Commit-Position: refs/heads/master@{#27574}

[paul.l..., 2015-04-01 03:08:22]

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

[paul.l..., 2015-04-01 03:08:22]

PTAL. This doesn't use any more instructions than the previous encoding, but can
support the larger stack-size, slot-numbers.

[balazs.kilvady, 2015-04-01 17:42:30]

lgtm.

[dusmil.imgtec, 2015-04-01 17:42:52]

lgtm.

[paul.l..., 2015-04-01 17:44:26]

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

[commit-bot: I haz the power, 2015-04-01 17:44:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1043393002/1

[commit-bot: I haz the power, 2015-04-01 18:18:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-01 18:18:48]

Patchset 1 (id:??) landed as
https://crrev.com/94506cc3c295dc8a47d55afa9f249b273bd5d7f1
Cr-Commit-Position: refs/heads/master@{#27574}