[U-Boot] BayTrail FSP release v4

[Bin Meng]

Hi Simon, Andrew,

Just noticed that Intel has released the FSP for BayTrail version 4.

The release notes is at here:
http://www.intel.com/content/www/us/en/embedded/software/fsp/atom-e3800-fsp-g4-release-notes.html

Like Andrew contacted Intel and got the message, that Intel does not
plan to release an FSP spec v2 complaint FSP for BayTrail, which looks
like so. The v4 version is still FSP spec v1 :(

But we should consider update MinnowMax instructions to use v4?

Regards,
Bin