gps: modify NMEA_PROVIDER to Modem processor

This fixes duplicate NMEA problem observed when NMEA is generated on AP side.

Bug: 12555056

Change-Id: I4431dfa81c4cb407ace6c434e991d5491ab90550

Conflicts:
	gps/gps.conf
msm8974: Enable QCNE if available

Change-Id: I98858a0ef14dfdf5529355ad4f0376799e46f21f
msm8974: Re-add separate FAST device path

 * It seems all we needed is to OR deep buffer into the primary path
   to catch the stragglers.
 * This improves path selection for FAST tracks since error cases can
   be avoided when non-standard sample rates are used.

Change-Id: I7e9cc5df946d0cbe7e36c3fe0768b5ec7e47ed19
gps: Switch ntp server back to time.gpsonextra.net

Change-Id: I455a8a717a214c58724997cb8ac914bbac049042
gps: Reduce debug level

Change-Id: Ib4e5aab1d9764e3df66f4a5c020d5d9322adc57c
Overlay: Enable AGPS location setting

Change-Id: I0adf7e26b5c1a197a5b0cd7e451d610deb6764a6