Revert "t769: Add some missing defines and ifdefs to the board-msm8x60.c."

This reverts commit d97e330d3cf332c673dff06dcdf4a2e785dbc804.
t769: added missing ifdefs for speakerphone echo

 * Reduces echo on speakerphone for t769

Change-Id: I37b2c245ae22e924548756082f52efc374d31ed0