`openwrt_dropbear`

Lookup key should just be `dropbear`

Default from Beryl AX (maybe)
```
config dropbear
	option PasswordAuth 'on'
	option RootPasswordAuth 'on'
	option Port         '22'
```

https://openwrt.org/docs/guide-user/base-system/dropbear

```hcl
resource "openwrt_dropbear" "dropbear" {
  password_auth = "on"
  root_passwod_auth = "on"
  port = "22"
}
```