qcom-fm: audio: Add support for FM feature

-Define audio stream for FM
-Define audio source for FM RX and FM RX A2DP

Change-Id: If24e4c32916f6614e3367b4c9f2cd828562e0347

Conflicts:
	include/system/audio.h
Merge commit 'refs/changes/95/33295/1' of http://review.cyanogenmod.org/CyanogenMod/android_system_core into cm-10.1