[U-Boot] Chain-loading u-boot stopped working between 2016.01-rc1 and 2016.01-rc4

Hi!

I'm loading u-boot using tftp from u-boot 2013.01. Marek will claim that this configuration is unsupported, but it enables fairly quick development and was very useful for me in past.

Unfortunately, it stopped working between 2016.01-rc1 and -rc4. Before I start bisecting it, I wanted to ask if someone has idea what might be responsible? Pavel