ppc4xx: Fix build problems of IBM DDR2 NAND booting targets

This change is needed to compile the PPC4xx NAND booting targets
equipped with the IBM DDR2 SDRAM controller.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Stefan Roese <sr@denx.de>
1 file changed