endeavoru: Device repo cleanup part 2

Squashed commit of the following:

commit 0622df1aa21f9a9e4f2cedc7fb93b6161484f6b8
Author: Thomas Wendt <thoemy@gmx.net>
Date:   Wed Aug 28 23:27:25 2013 +0200

    Remove common nvram and model_frontal configs

commit c6d441ef04c6d46b64611611a35dda131316640c
Author: Thomas Wendt <thoemy@gmx.net>
Date:   Wed Aug 28 23:05:30 2013 +0200

    Remove common audio and media configs

    The configs where not identical with the enrc2b ones becaus of manual weaks
    and maybe some differences in the stock Sense 4.5.
    On Sense 5 the files are identical bewtween the two devices and they also
    equal the ones enrc2b was already using.

commit ba9608a0413ddac6a376bd6f9d965bb6b73b8567
Author: Thomas Wendt <thoemy@gmx.net>
Date:   Wed Aug 28 22:54:52 2013 +0200

    Configs restructuring

Change-Id: If41db079de943a06f329a25e2f1d5fba7d730ba4