[U-Boot] Commit acc4959fc breaks mx28evk

[Fabio Estevam]

Hi Marek,

This commit in u-boot-imx causes mx28evk board to not boot:

commit acc4959fc1b3e61beb372f686595eb2f90240c92
Author: Marek Vasut <marex at denx.de>
Date:   Thu May 3 05:47:18 2012 +0000

    Revert "i.MX28: Enable additional DRAM address bits"

Can you please check?

Regards,

Fabio Estevam