wifi: add suport for WIFI_EXT_MODULE

Some wifi modules have dependencies on others (for SDIO, usually).
Use WIFI_EXT_MODULE_PATH to specify such dependencies

Change-Id: Ie8e746c1e69712be78d420d8e8ae8b015564a03d

Conflicts:

	wifi/wifi.c

Change-Id: I3fbc0065f76d91d170fb562159ea326caa4f3345
Merge remote-tracking branch 'CyanogenMod/cm-10.1' into cm-10.1

Conflicts:
	wifi/wifi.c
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