fstab: add noauto_da_alloc to /cache
mako: Enable USB audio

https://github.com/CyanogenMod/android_device_asus_flo/commit/3bd640afbd92748f63f0c9767405d556cd42c697

Change-Id: I7a27a6ea05bae283baeccc9b8aed9f632d1abb53