Merge Audio Changes from CyanogenMod

# Audio
BOARD_USES_ALSA_AUDIO := true
BOARD_USES_LEGACY_ALSA_AUDIO := true
TARGET_USES_QCOM_MM_AUDIO := true
BOARD_HAVE_NEW_QCOM_CSDCLIENT := true
BOARD_HAVE_CSD_FAST_CALL_SWITCH :=true
BOARD_USES_FLUENCE_INCALL := true
BOARD_USES_SEPERATED_AUDIO_INPUT := true
BOARD_USES_SEPERATED_VOICE_SPEAKER_MIC := true
# QCOM enhanced A/V
TARGET_ENABLE_QC_AV_ENHANCEMENTS := true
Attached Link to file : https://github.com/CyanogenMod/android_device_sony_huashan/blob/cm-11.0/BoardConfig.mk