Add option for pds api deployment config

To allow testing devices that use pds api.

Change-Id: I03d36ae4603cb203ac94b49bc2d0ee9faacdd44e
CRs-fixed: 2734275
diff --git a/etc/gps.conf b/etc/gps.conf
index f7e0972..43cc33f 100644
--- a/etc/gps.conf
+++ b/etc/gps.conf
@@ -312,8 +312,9 @@
 ##################################################
 # 0 : Enable QTI GNSS (default)
 # 1 : Enable QCSR SS5
-# This setting use to select between QTI GNSS
-# and QCSR SS5 hardware receiver.
+# 2 : Enable PDS API
+# This setting use to select between QTI GNSS,
+# QCSR SS5 hardware receiver, and PDS API.
 # By default QTI GNSS receiver is enabled.
 # GNSS_DEPLOYMENT = 0