[U-Boot] Copying default environment to NVRAM

[rory]

Is there some flag or normal way to get the default environment that is 
in RAM to get written to NVRAM? I'm currently going to put a routine in 
our preboot code to do so, but was wondering if there was an officially 
sanctioned "right" way to do this. I've looked thru code and FAQ's and 
the best I can find is to run "saveenv" from the CLI, but that's not 
really a good solution.

thx