smdk4412-common: Enable home button wake setting && Remove unnecessary wallpaper overlay

Seriously, how did that wallpaper even get there.

Patch Set 2: Fix ub0r derp.

Change-Id: I51e0ee362a05ae61535e1530ef291da28861015a
Merge branch 'cm-10.2' of git://github.com/CyanogenMod/android_device_samsung_smdk4412-common into cm-10.2