MIPS64: Fix simulator arguments handling on generated code entry.

MIPS64: Fix simulator arguments handling on generated code entry.

Removed workaround for this issue.

TEST=mjsunit, cctest on sim64
BUG=
R=paul.lind@imgtec.com

Committed: https://code.google.com/p/v8/source/detail?r=25043

[dusmil.imgtec, 2014-10-31 17:24:30]

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

[paul.l..., 2014-10-31 17:28:27]

LGTM, but can you update the commit message with at least one specific failing
test that this fixes?

[dusmil.imgtec, 2014-10-31 18:07:42]

Fixing out GH issue #92.

[dusmil.imgtec, 2014-10-31 18:08:44]

On 2014/10/31 18:07:42, dusmil.imgtec wrote:
> Fixing out GH issue #92.
 Sorry, typo. Fixing our Github issue #92.

[paul.l..., 2014-10-31 18:32:21]

Got it. This is fine to land as is. 

Once we move to the new repo (post git-transition) we might reference our own
issues in the BUG= part of the commit message. But let's not do that now, since
this repo/issue-tracker will go away soon.

[dusmil.imgtec, 2014-10-31 18:33:45]

Committed patchset #1 (id:1) manually as 25043 (tree was closed).