clocksource: arm_generic: use this_cpu_ptr per-cpu helper
clocksource: arm_generic: use this_cpu_ptr per-cpu helper

Utilize this_cpu_ptr() instead of per_cpu_ptr(...,smp_processor_id())

Signed-off-by: Shan Wei <49fd333a353791bf0142525ef4715c0206e6c8ea@tencent.com>
Reviewed-by: Christoph Lameter <ef3ecccf258fa062c5c6521a4887d40541963af7@linux.com>
Signed-off-by: John Stultz <33837adfb53316eae44aad04041e1240088d76fd@linaro.org>

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