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
(cherry picked from commit f14381de23817be3b4722f4b3e9bc6cc9b0f18a9)