Removed superfluous deopt for ROR on ia32.

Removed superfluous deopt for ROR on ia32.

We only synthesize a ROR when we have an expression with a toplevel
'|', which returns a signed value by definition, so deopting on
negative values is not needed. ia32 was the only platform where this
was done, all other didn't have the check.

R=ulan@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=24133

[Sven Panne, 2014-09-23 07:47:50]

svenpanne@chromium.org changed reviewers:
+ ulan@chromium.org

[ulan, 2014-09-23 07:48:17]

lgtm

[Sven Panne, 2014-09-23 08:06:10]

Committed patchset #1 (id:1) manually as 24133 (presubmit successful).