use --all-devices to test all devices
use --all-devices to test all devices

--all-devices will make compat_checker.py test all device types,
not just the ones appearing on compat_props.

Signed-off-by: Eduardo Habkost <50373d7c08ceadf576dd7dca718012445b677ce6@redhat.com>

ehabkost/gdb-qemu,ehabkost/gdb-qemu