hrtimer: reprogram remote CPU's timer hardware

Currently it is not possible to queue a hrtimer on a remote CPU
that expires before any other existing timer on that CPU. Send
an IPI to remote CPU to reprogram the hardware to get rid of
this limitation.

Change-Id: I69f6a267bb65e558ec35f802d678a67ba1ee1c29
Signed-off-by: Srivatsa Vaddagiri <vatsa@codeaurora.org>
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>