video: omap: delete support for early fbmem allocation

video: omap: delete support for early fbmem allocation

Commit b25ccd6cc06409ac10d6a517edbc38a46c23c56f (OMAPFB: remove early mem
alloc from old omapfb) deleted the support for early fbmem allocation
from the platform code, but some code still remains in the driver side.
Delete this code now, as it repotedly causes build issues on !MMU.

The patch was tested on Amstrad E3 and Nokia 770 and framebuffer
functionality is not affected.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>