msm7x30: Initial audio_policy.conf update

Change-Id: I48543240ef517ae7f2aa8563ed6c87dd464ce792
msm7x30: Compress ramdisk with minigzip

* imgdiff that generates recovery_from_boot.p fails if we set anything else than minigzip

Change-Id: Ied83aa4cfc0f8bcd2b9853fb6eae31929338780b