Make default env for wm demo

Source: Mentor Graphics Corporation
MR: FBT-147
Type: Enhancement
Disposition: Local
Description:
Make the default u-boot env for the sabrelite match that
needed for the washing machine demo

Signed-off-by: John Mehaffey <mehaf@gedanken.com>
u-boot command trimming for WMD

Source: Mentor Graphics Corporation
MR: FBT-147
Type: Enhancement
Disposition: Local
Description:
Remove some unused commands to pare down the size of u-boot
Signed-off-by: John Mehaffey <mehaf@gedanken.com>