[PATCH] powerpc: Revert to default atomic ops in elision code

[Gabriel Ferreira Teles Gomes]

On Thu, Aug 13, 2015 at 04:21:05PM -0500, Paul E. Murphy wrote:
>Power ISA 2.07B section B.5.5 relaxed the barrier requirement around a
>TLE enabled lock.  It is now identical to a traditional lock.

For the record, this is in Book II.
The patch looks good to me.