OMAP4: Fix the emif and dmm virtual mapping

Fix the address overlap with Emulation domain (EMU).

The previous mapping was entering into EMU mapping
and was not as per comments. Fix the mapping accordingly.

Signed-off-by: Girish S G <girishsg@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>