PPC: Remove unnecessary options from HTailCallThroughMegamorphicCache

PPC: Remove unnecessary options from HTailCallThroughMegamorphicCache

Port e0844a24d35c03c6971b8beb633c3506c212179a

Original commit message:
These options were added for a hydrogen code stub version of
the VectorIC dispatcher, which was discontinued.

R=mvstanton@chromium.org, michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/3118df23624d36496d8a015a9aa694489d3eeeca
Cr-Commit-Position: refs/heads/master@{#27797}

[MTBrandyberry, 2015-04-13 17:11:55]

Fix PPC breakage.

[michael_dawson, 2015-04-13 17:33:52]

On 2015/04/13 17:11:55, mtbrandyberry wrote:
> Fix PPC breakage.

lgtm.

[MTBrandyberry, 2015-04-13 17:33:57]

The CQ bit was checked by mbrandy@us.ibm.com

[commit-bot: I haz the power, 2015-04-13 17:34:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1088573002/1

[commit-bot: I haz the power, 2015-04-13 18:44:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-13 18:45:02]

Patchset 1 (id:??) landed as
https://crrev.com/3118df23624d36496d8a015a9aa694489d3eeeca
Cr-Commit-Position: refs/heads/master@{#27797}