Revert "cpuidle: Fix cpu frequent exits from low power mode"

This reverts 'commit ae04811d ("cpuidle: Fix cpu frequent
exits from low power mode")'. Fix is identified for LPM modes
regressions. Clock event device is not getting programmed in
hrtimer_cancel as hrtimer_next_event_without() sets
cpu_base.next_timer to NULL unconditionally.

Change-Id: Ic4604da1c7829a49d3a2a54b1426f3024b26f731
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>