smdk4412: advanced settings: add spen support back

Change-Id: Ia7243737261bf63e406cd550d417f80b0f9a92cf
t0lte: user configureable voice/streaming volumes [2/2]

relies on http://review.cyanogenmod.org/#/c/43834/

Change-Id: I03367bf0424257d906a6c8e059e4ca6d9faa7dec