soc:qcom: Add support to log time taken ipi pings

In some cases there is no way to find which core
is taking long time for responding to pings. When
dumps are collected there is no way to find culprit
cpu details and exact task context disabled IRQs.
So add support for logging time taken for each ping.

Change-Id: Ifa6fb42413857c2b3fe15c8719faa1ab1a953069
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>