PineBook Pro: bwfm0 firmware not in tree?

[Andrew Gillham <gillham%gmail.com@localhost>]

I saw the tweet that wifi works on the PineBook Pro in -current, but
it doesn't appear the firmware is in the image.  At least I see it
calling for brcmfmac43456-sdio.bin and it isn't in
./libdata/firmware/if_bwfm/ on the image.  I don't see it in CVS in
src/external/broadcom/bwfm/dist/ either.

The file I found from armbian (which matches another from another
project) works somewhat but causes a checksum error message to log
occasionally and sometimes a kernel panic.

What's the correct wifi firmware for the PineBook Pro and where can I find it?

-Andrew