pps: DR_SYNC pulse needs to be connected to Linux PPS driver

DR_SYNC pulse needs to be connected to Linux PPS driver for
GNSS driver to receive pps_event. DR_SYNC pulse is generated
by GSS firmware in modem, GNSS driver needs to receive
pps_event of this pulse to get the kernel timestamp to
synchronize time/data to finer quality.

Change-Id: I1c686fcf6306e890cc0a5c3296cdcaff49282e2f
CRs-Fixed: 1068214
Signed-off-by: Madhanraj Chelladurai <mchellad@codeaurora.org>