Revert "msm8974: Enable IZat"

This reverts commit 1fd3bb9518f93b5d987d4592c67bb23f901e3dab.
msm8974: Remove VECTORIMPL_SYMBOLS hack

 * Welcome to 1980 br0s

Change-Id: Iae3c2d4926c88740e3fd7282826623d9f263ab80
msm8974: Update GPS HAL to LA.BF.1.1_rb1.16

Change-Id: Iacfcdee2661f1ac8f76813b40d8af6063b23b059
msm8974: Enable IZat

 * DO NOT MERGE, requires additional verification

Change-Id: I0a2906a3ada188571ad1ae1dfa543d3cd60fa3ed