cpuidle/pseries: Fix fallout caused due to cleanup in pseries cpuidle backend driver

cpuidle/pseries: Fix fallout caused due to cleanup in pseries cpuidle backend driver

Commit dd5663c98f56569 ("sched/idle, PPC: Remove redundant
cpuidle_idle_call()") reintroduced ppc64_runlatch_off/on() in the
pseries cpuidle backend driver. Hence the cleanup caused by the
commit "47664ed641ec2d82:pseries/cpuidle: Remove redundant call
to ppc64_runlatch_off() in cpu idle routines"  in conjuction
with the commit dd5663c98f56569 causes a build failure.

Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Link: http://lkml.kernel.org/r/52FAFD2D.2090306@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>