Most appropriate image and u-boot for banana-pi M5

[Max Baroi <max%baroi.com@localhost>]

I sent an email a few days ago, but when I looked at the listserv 
history on https://mail-index.netbsd.org/port-arm/ it didn't appear, so 
I thought I'd send it again. Apologies, I don't mean to spam.

I got a banana-pi m5 : https://wiki.banana-pi.org/Banana_Pi_BPI-M5

It has an amlogic board and the only port which references amlogic is 
aarch64, so I burned that to a micro sd. But I don't know which u-boot 
to use.

Any help would be appreciated,

Max