Rock 5B image/kernel with working bifurcation

Hello
Are there any image of Rock 5B that supports pcie bifurcation? With Rock 5B+ I expected that thos changes should come to 5B, but to my surprise none of available images works with that :confused: (also including few alternative images with edge and mainline kernel).
At the end I was able to get that to work mixing stuff from 5B+, but it would be better to have that included in other images.