[IA64] sn2: add missing put_cpu()
[IA64] sn2: add missing put_cpu()

sn_hwperf_op_cpu() uses get_cpu() but is missing a corresponding put_cpu().

Reported-by: Thomas Meyer <5f50a84c1fa3bcff146405017f36aec1a10a9e38@m3y3r.de>
Acked-by: Jack Steiner <9fc09c92f9d4898dd6e5af3e81679b627e939258@sgi.com>
Signed-off-by: Tony Luck <e7984595ec0368ff920a7b3521dc7093683f6f26@intel.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs