Adding libaudio
Added audio policy
libaudio is only Pepper compatible
Added sd card make script
Revert "Added sd card make script"
Overlay is only used for resources

This reverts commit 003baa0e9f7058afbc7d59fa4b87053712876592.
Add basic Audio support for Pepper

Pepper uses the TLV320AIC3106 Audio Codec via McASP0.  This is clocked
by a 12MHz oscillator and uses the AXR0 and AXR1 data lanes. The headset
jack is connected to the HPLOUT and HPROUT outputs.

Note: Bluetooth PCM is also connected to the audio codec but is not
enabled in this commit.
Added sd card make script
Merge branch 'dev' of https://github.com/adam-lee/pepper into dev
Corrected audio HAL path
Corrected hw parameter to init audio codec