Update Sanei N90 DRAM settings to match u-boot.

Signed-off-by: Adam Sampson <ats@offog.org>
Disable unused MMC ports on the Sanei N90.

The N90 and its generic equivalents only have one external SD slot.

Signed-off-by: Adam Sampson <ats@offog.org>
csi1 isn't used, so it doesn't need any configuration.

Signed-off-by: Adam Sampson <ats@offog.org>
Merge pull request #14 from atsampson/master

Sanei N90 cleanups