msm: cpr: Use Consecutive Down to avoid any spurious interrupt

CPR would now route a down interrupt to App only when the
recommendation remains same across 2 successive interrupts
thereby reducing any interrupts resulting from a spike
during sampling.

Change-Id: I302bd9744c98ec36e2b06ec94b22bab49e27c7c6
Signed-off-by: Kaushal Kumar <kaushalk@codeaurora.org>