Revert "fmradio: enable STE radio"

This reverts commit 11793000ea4706c2424ca12b5284d3ff489a5062.

Change-Id: Ib8513d35ad7f272ea584f1ad48724739a405f1ca
alsa_sound: Add support for seperated FM devices

 * Some devices have special headset and speaker devices
   tuned for FM output.
 * Enable with BOARD_USES_SEPERATED_FM

Change-Id: Iac47043d2ee186208623bea7b34465592797ea1e