Timings: Try using mme4crt directly

```
pi@retropie:~ $ ./mme4crt 320 240 60 0 0 2
width : 320
height : 240
freq : 60.000000
shift : 0
super res : 0
mode : 2
pi@retropie:~ $ Powering on HDMI with explicit settings (DMT mode 87)
```

nothing happens, sadly.  guess i'm missing something dumb.  probably need to use in conjunction with tvservice