With this wifi seem to work reliably, and it is possibly to for
example connect to a bluetooth speaker and play music.
For wifi, issue seem to be with the nvram_net.txt file, changing only
that one to a newer one makes wifi work. Here, both the .txt and .bin
file are updated, as the old files are from 2012, while the new
ones have a datestamp from 2019.
The downstream kernel provider does not exist any more (see
samsung-m0-downstream if you really want the vendor kernel), so remove
this as it is unused.