Comment 2 for bug 1907056

Fwiw, the dtbs/ dir:
$ ls pi-kernel-armhf-rev266/dtbs/
bcm2708-rpi-b.dtb bcm2710-rpi-cm3.dtb bcm2835-rpi-zero.dtb
bcm2708-rpi-b-plus.dtb bcm2711-rpi-400.dtb bcm2835-rpi-zero-w.dtb
bcm2708-rpi-b-rev1.dtb bcm2711-rpi-4-b.dtb bcm2836-rpi-2-b.dtb
bcm2708-rpi-cm.dtb bcm2711-rpi-cm4.dtb bcm2837-rpi-3-a-plus.dtb
bcm2708-rpi-zero.dtb bcm2835-rpi-a.dtb bcm2837-rpi-3-b.dtb
bcm2708-rpi-zero-w.dtb bcm2835-rpi-a-plus.dtb bcm2837-rpi-3-b-plus.dtb
bcm2709-rpi-2-b.dtb bcm2835-rpi-b.dtb bcm2837-rpi-cm3-io3.dtb
bcm2710-rpi-2-b.dtb bcm2835-rpi-b-plus.dtb overlays.tgz
bcm2710-rpi-3-b.dtb bcm2835-rpi-b-rev2.dtb
bcm2710-rpi-3-b-plus.dtb bcm2835-rpi-cm1-io1.dtb

$ ls pi-kernel-arm64-rev264/dtbs/
broadcom/ overlays/