msm7x30: remove kernel headers.

Change-Id: I564a6cde32f5fc162cff979b1dbc2a4908864977
msm7x30: use caf audio.

Change-Id: Iba15cfffe4ded7da0c0a51430812b725dfdbdb31

Conflicts:

	BoardConfigCommon.mk
BoardConfig: no longer use prebuilt headers

Change-Id: Ic114ea084298bf3b2697ca3558ed16ee2241833a