Comment 5 for bug 1916230

Hmm, since 69202b406e3 moved it to the top (to be available in th esubdir to hw/s390x that won't work without doing something similar. I don't want to drag all the chain with me, as-is that would also need c87ea116 "configure: add --without-default-features" and 0a189110 "meson: cleanup Kconfig.host handling" and who knows what else.
I've taken just the define for have_virtfs of 69202b406e3 and nothing else to keep the delta small.
Since in 5.2 nothing else uses that variable that should be save.