msm: pp2s: Add sysfs node to cause reset of time

Add a sysfs node to reset a newly recalculated time from user space.

Change-Id: I3b68d078689c26ef71cdebe3973bc5283144b3fa
Acked-by: Perry Randise <prandise@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>