smdk4412: Fix EGL extension failing (good ol' times) and fix build

Yeah, that did happen already in the past... Love you.

Change-Id: I932896e2f47fb2f833200010bca22ccde8a2aac4
BoardCommonConfig: remove GL hack at device tree level

Change-Id: Iaacaa651ca3b762a926cc69bb4fcecfb65348452