Compare the generated devices

generate a `/dev` using:
```
target/debug/mdev -s --devpath /tmp/mdev-dev/
```

use [mdevd](https://skarnet.org/software/mdevd/) 
``` sh
mkdir /tmp/mdevd-dev
sudo mdevd -d /tmp/mdevd-dev & 
sleep 2
# triggers the add events for /sys
sudo mdevd-coldplug
```
