Build standard GPS HAL and remove this custom one

Revert "gps: Fork the GPS HAL"

This reverts commit 2dd0f2ce44c582d7905868a3d4b58faf3e215500.

g2: gps: Set TARGET_GPS_HAL_PATH

Change-Id: If9b910ab061a014c9b19888a4a8df21ced734520