Revert "fmradio: cleanup QCOM_FM_ENABLED/STE_FM defs and ifdef"

This reverts commit 0b80bd63c6b1b6970226913849c61836daa16af0.
qcom-fm: audio: add support for FM feature

-Add set_fm_volume() to set handle fm volume

Change-Id: I2a2c6a60b9855d9360ff8fb90849517e77e5faab

Conflicts:

	audio/AudioPolicyManagerBase.cpp
	include/hardware_legacy/AudioSystemLegacy.h