Revert "omaplfb: If the framebuffer is in VRAM avoid mapping into Tiler1D"

This reverts commit a3d8be2b25e17bf98573f694df2ddfc00a22224a.

omaplfb is not built from these sources, so revert this patch
to reduce diff against CM

Change-Id: I9c9f50fbfecafa3ad706405ec8f33202213b1d1f