board/t2080qds: some update for ddr

- add support for 2nd DIMM slot.
- make it work with DIMM which is less than 2GB.

Verified with two 2GB UDIMM MT9JSF25672AZ-2G1K1 in two DIMM slots.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
2 files changed