PPC: [turbofan] Support for CPU models lacking isel.

PPC: [turbofan] Support for CPU models lacking isel.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/789ad2f4a93b2fa3de2dca310ba4161e8f61df62
Cr-Commit-Position: refs/heads/master@{#34090}

[MTBrandyberry, 2016-02-17 18:24:13]

The CQ bit was checked by mbrandy@us.ibm.com to run a CQ dry run

[commit-bot: I haz the power, 2016-02-17 18:24:17]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1710453002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1710453002/1

[commit-bot: I haz the power, 2016-02-17 18:42:02]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-02-17 18:42:03]

Dry run: This issue passed the CQ dry run.

[michael_dawson, 2016-02-17 19:04:44]

On 2016/02/17 18:42:03, commit-bot: I haz the power wrote:
> Dry run: This issue passed the CQ dry run.

lgtm

[MTBrandyberry, 2016-02-17 19:11:44]

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

[commit-bot: I haz the power, 2016-02-17 19:11:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1710453002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1710453002/1

[commit-bot: I haz the power, 2016-02-17 19:14:37]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-17 19:14:52]

Description was changed from

==========
PPC: [turbofan] Support for CPU models lacking isel.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
==========

to

==========
PPC: [turbofan] Support for CPU models lacking isel.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/789ad2f4a93b2fa3de2dca310ba4161e8f61df62
Cr-Commit-Position: refs/heads/master@{#34090}
==========

[commit-bot: I haz the power, 2016-02-17 19:14:53]

Patchset 1 (id:??) landed as
https://crrev.com/789ad2f4a93b2fa3de2dca310ba4161e8f61df62
Cr-Commit-Position: refs/heads/master@{#34090}