BoardConfig: Add new BOARD_HAVE_HTC_AUDIO flag.

This is needed to fix mic during phone calls when using audio-caf

Change-Id: I9e5858c3a7835ddc1ba207a8f540dd591f49c1dd

Conflicts:
	BoardConfigCommon.mk
configs: Update audio_policy.conf

Change-Id: I60cac646e83083f6066b903f130d228ac8f15f15
msm7x30: add audio.usb hal

Change-Id: Ifa7d1cc6dc5b714a37e64f504425b6b62d325c06