Hello,
I've send a patch to u-boot upstream that enable sata on wandboard quad. This patch operates as appropriate on the device, but it also need to be tested on wandboard single/dual which don't have the sata port. (because the u-boot binary is the same for all board variants).
https://lists.denx.de/pipermail/u-boot/2017-February/281505.html
You need to apply the patch to the current u-boot upstream tree (or to the u-boot fedora spec) and report the serial output
Thx for sending the feedback to the u-boot ml directly. (eventually with Sefano Babic cc'ed).