Add support for 8641 Rev 2 silicon.

Without this patch, I am unable to get to the prompt on rev 2 silicon.
Only set ddrioovcr for rev1.

Signed-off-by: Ed Swarthout<ed.swarthout@freescale.com>
Signed-off-by: Jon Loeliger <jdl@freescale.com>
1 file changed